From 8f3ab7649e0b67056892be2c13e0495348c31d2a Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Sun, 4 May 2025 14:38:13 +0530
Subject: [PATCH 01/12] Prune old LA based on ENV variable

---
 .ci/run_tests.jl            | 5 ++---
 test/abstractq.jl           | 3 ++-
 test/addmul.jl              | 3 ++-
 test/adjtrans.jl            | 3 ++-
 test/bidiag.jl              | 3 ++-
 test/bitarray.jl            | 9 ++++++++-
 test/blas.jl                | 3 ++-
 test/bunchkaufman.jl        | 3 ++-
 test/cholesky.jl            | 3 ++-
 test/dense.jl               | 3 ++-
 test/diagonal.jl            | 3 ++-
 test/eigen.jl               | 3 ++-
 test/factorization.jl       | 3 ++-
 test/generic.jl             | 3 ++-
 test/givens.jl              | 3 ++-
 test/hessenberg.jl          | 3 ++-
 test/lapack.jl              | 3 ++-
 test/ldlt.jl                | 3 ++-
 test/lq.jl                  | 3 ++-
 test/lu.jl                  | 3 ++-
 test/matmul.jl              | 3 ++-
 test/pinv.jl                | 3 ++-
 test/qr.jl                  | 3 ++-
 test/runtests.jl            | 3 ++-
 test/schur.jl               | 3 ++-
 test/special.jl             | 3 ++-
 test/structuredbroadcast.jl | 3 ++-
 test/svd.jl                 | 3 ++-
 test/symmetric.jl           | 3 ++-
 test/symmetriceigen.jl      | 3 ++-
 test/triangular.jl          | 3 ++-
 test/triangular2.jl         | 3 ++-
 test/triangular3.jl         | 3 ++-
 test/tridiag.jl             | 3 ++-
 test/uniformscaling.jl      | 3 ++-
 test/unitful.jl             | 3 ++-
 36 files changed, 78 insertions(+), 38 deletions(-)

diff --git a/.ci/run_tests.jl b/.ci/run_tests.jl
index 8a54ef62..879b73b1 100644
--- a/.ci/run_tests.jl
+++ b/.ci/run_tests.jl
@@ -6,6 +6,5 @@ end
 
 proj = abspath(joinpath(@__DIR__, ".."))
 cmd = """Base.runtests(["LinearAlgebra"]; propagate_project=true, ncores=$ncores)"""
-withenv("JULIA_NUM_THREADS" => 1) do
-    run(`$(Base.julia_cmd()) --project=$proj --compiled-modules=existing -e $cmd`)
-end
+run(addenv(`$(Base.julia_cmd()) --project=$proj --compiled-modules=existing -e $cmd`,
+    "JULIA_NUM_THREADS" => 1, "JULIA_PRUNE_OLD_LA" => true))
diff --git a/test/abstractq.jl b/test/abstractq.jl
index ff1499ae..d59d1b39 100644
--- a/test/abstractq.jl
+++ b/test/abstractq.jl
@@ -2,7 +2,8 @@
 
 module TestAbstractQ
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test
 using LinearAlgebra
diff --git a/test/addmul.jl b/test/addmul.jl
index f6b49d4e..803f72c9 100644
--- a/test/addmul.jl
+++ b/test/addmul.jl
@@ -2,7 +2,8 @@
 
 module TestAddmul
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Base: rtoldefault
 using Test
diff --git a/test/adjtrans.jl b/test/adjtrans.jl
index 975e9a44..e5594468 100644
--- a/test/adjtrans.jl
+++ b/test/adjtrans.jl
@@ -2,7 +2,8 @@
 
 module TestAdjointTranspose
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/bidiag.jl b/test/bidiag.jl
index 209fb024..639e38ac 100644
--- a/test/bidiag.jl
+++ b/test/bidiag.jl
@@ -2,7 +2,8 @@
 
 module TestBidiagonal
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasReal, BlasFloat
diff --git a/test/bitarray.jl b/test/bitarray.jl
index a185873e..506f961d 100644
--- a/test/bitarray.jl
+++ b/test/bitarray.jl
@@ -1,4 +1,9 @@
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+# This file is a part of Julia. License is MIT: https://julialang.org/license
+
+module BitArray
+
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using LinearAlgebra, Test, Random
 
@@ -95,3 +100,5 @@ b2 = bitrand(v1)
 
 b1 = bitrand(n1, n1)
 @check_bit_operation diag(b1)
+
+end
diff --git a/test/blas.jl b/test/blas.jl
index b7f4a03a..75bffeb7 100644
--- a/test/blas.jl
+++ b/test/blas.jl
@@ -2,7 +2,8 @@
 
 module TestBLAS
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasReal, BlasComplex
diff --git a/test/bunchkaufman.jl b/test/bunchkaufman.jl
index cf4fa488..b87a1264 100644
--- a/test/bunchkaufman.jl
+++ b/test/bunchkaufman.jl
@@ -2,7 +2,8 @@
 
 module TestBunchKaufman
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted
diff --git a/test/cholesky.jl b/test/cholesky.jl
index c03ec3f0..5ea1697c 100644
--- a/test/cholesky.jl
+++ b/test/cholesky.jl
@@ -2,7 +2,8 @@
 
 module TestCholesky
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted,
diff --git a/test/dense.jl b/test/dense.jl
index 99e0b429..e89ea819 100644
--- a/test/dense.jl
+++ b/test/dense.jl
@@ -2,7 +2,8 @@
 
 module TestDense
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal
diff --git a/test/diagonal.jl b/test/diagonal.jl
index 2b7cfd4d..051b77ff 100644
--- a/test/diagonal.jl
+++ b/test/diagonal.jl
@@ -2,7 +2,8 @@
 
 module TestDiagonal
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasFloat, BlasComplex
diff --git a/test/eigen.jl b/test/eigen.jl
index 67e58d34..e1544353 100644
--- a/test/eigen.jl
+++ b/test/eigen.jl
@@ -2,7 +2,8 @@
 
 module TestEigen
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted, UtiAUi!
diff --git a/test/factorization.jl b/test/factorization.jl
index b215c246..01e6fe68 100644
--- a/test/factorization.jl
+++ b/test/factorization.jl
@@ -2,7 +2,8 @@
 
 module TestFactorization
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/generic.jl b/test/generic.jl
index 521beaf4..a2103e83 100644
--- a/test/generic.jl
+++ b/test/generic.jl
@@ -2,7 +2,8 @@
 
 module TestGeneric
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using Test: GenericArray
diff --git a/test/givens.jl b/test/givens.jl
index fb09ec4e..c309c933 100644
--- a/test/givens.jl
+++ b/test/givens.jl
@@ -2,7 +2,8 @@
 
 module TestGivens
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: Givens, Rotation, givensAlgorithm
diff --git a/test/hessenberg.jl b/test/hessenberg.jl
index 8485c014..b6cd6aa1 100644
--- a/test/hessenberg.jl
+++ b/test/hessenberg.jl
@@ -2,7 +2,8 @@
 
 module TestHessenberg
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/lapack.jl b/test/lapack.jl
index 12ed2145..5cd95c50 100644
--- a/test/lapack.jl
+++ b/test/lapack.jl
@@ -2,7 +2,8 @@
 
 module TestLAPACK
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasInt
diff --git a/test/ldlt.jl b/test/ldlt.jl
index 3454ef43..eb15679d 100644
--- a/test/ldlt.jl
+++ b/test/ldlt.jl
@@ -2,7 +2,8 @@
 
 module TestLDLT
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/lq.jl b/test/lq.jl
index 0d55f84f..fa364891 100644
--- a/test/lq.jl
+++ b/test/lq.jl
@@ -2,7 +2,8 @@
 
 module TestLQ
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, rmul!, lmul!
diff --git a/test/lu.jl b/test/lu.jl
index ba869032..b496886b 100644
--- a/test/lu.jl
+++ b/test/lu.jl
@@ -2,7 +2,8 @@
 
 module TestLU
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: ldiv!, BlasReal, BlasInt, BlasFloat, rdiv!
diff --git a/test/matmul.jl b/test/matmul.jl
index d9635123..9eff42a2 100644
--- a/test/matmul.jl
+++ b/test/matmul.jl
@@ -2,7 +2,8 @@
 
 module TestMatmul
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Base: rtoldefault
 using Test, LinearAlgebra, Random
diff --git a/test/pinv.jl b/test/pinv.jl
index ecee397a..9495e4d8 100644
--- a/test/pinv.jl
+++ b/test/pinv.jl
@@ -2,7 +2,8 @@
 
 module TestPinv
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/qr.jl b/test/qr.jl
index 2b121ca4..f17f1438 100644
--- a/test/qr.jl
+++ b/test/qr.jl
@@ -2,7 +2,8 @@
 
 module TestQR
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted, rmul!, lmul!
diff --git a/test/runtests.jl b/test/runtests.jl
index d9539fba..36347e75 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,6 +1,7 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+prune_old_LA && include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/schur.jl b/test/schur.jl
index e0a16b80..8ebf802f 100644
--- a/test/schur.jl
+++ b/test/schur.jl
@@ -2,7 +2,8 @@
 
 module TestSchur
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted
diff --git a/test/special.jl b/test/special.jl
index aaad97b3..79926c4f 100644
--- a/test/special.jl
+++ b/test/special.jl
@@ -2,7 +2,8 @@
 
 module TestSpecial
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: rmul!, BandIndex
diff --git a/test/structuredbroadcast.jl b/test/structuredbroadcast.jl
index e4930a65..22858d73 100644
--- a/test/structuredbroadcast.jl
+++ b/test/structuredbroadcast.jl
@@ -2,7 +2,8 @@
 
 module TestStructuredBroadcast
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/svd.jl b/test/svd.jl
index fdcfcb30..bfd6cbd6 100644
--- a/test/svd.jl
+++ b/test/svd.jl
@@ -2,7 +2,8 @@
 
 module TestSVD
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted
diff --git a/test/symmetric.jl b/test/symmetric.jl
index c6b6fdc4..f624b2d2 100644
--- a/test/symmetric.jl
+++ b/test/symmetric.jl
@@ -2,7 +2,8 @@
 
 module TestSymmetric
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/symmetriceigen.jl b/test/symmetriceigen.jl
index 5af72b3a..6d94eaf4 100644
--- a/test/symmetriceigen.jl
+++ b/test/symmetriceigen.jl
@@ -2,7 +2,8 @@
 
 module TestSymmetricEigen
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 using LinearAlgebra: DivideAndConquer, QRIteration, RobustRepresentations
diff --git a/test/triangular.jl b/test/triangular.jl
index 642411fe..054e7f9c 100644
--- a/test/triangular.jl
+++ b/test/triangular.jl
@@ -2,7 +2,8 @@
 
 module TestTriangular
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: errorbounds, transpose!, BandIndex
diff --git a/test/triangular2.jl b/test/triangular2.jl
index 8740ff8d..cf29b8eb 100644
--- a/test/triangular2.jl
+++ b/test/triangular2.jl
@@ -2,7 +2,8 @@
 
 module TestTriangularReal
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Random
 
diff --git a/test/triangular3.jl b/test/triangular3.jl
index 9a29d681..ba5780e4 100644
--- a/test/triangular3.jl
+++ b/test/triangular3.jl
@@ -2,7 +2,8 @@
 
 module TestTriangularComplex
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Random
 
diff --git a/test/tridiag.jl b/test/tridiag.jl
index 423012c8..4d5455d9 100644
--- a/test/tridiag.jl
+++ b/test/tridiag.jl
@@ -2,7 +2,8 @@
 
 module TestTridiagonal
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/uniformscaling.jl b/test/uniformscaling.jl
index 21bd4b80..8b455b00 100644
--- a/test/uniformscaling.jl
+++ b/test/uniformscaling.jl
@@ -2,7 +2,8 @@
 
 module TestUniformscaling
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/unitful.jl b/test/unitful.jl
index 87c153c2..786f165a 100644
--- a/test/unitful.jl
+++ b/test/unitful.jl
@@ -1,6 +1,7 @@
 module TestUnitfulLinAlg
 
-isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 

From af131e2e9c4bf58e9d40fa903f5079cae764ada9 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Sun, 4 May 2025 14:41:28 +0530
Subject: [PATCH 02/12] Rename BitArray test module

---
 test/bitarray.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/bitarray.jl b/test/bitarray.jl
index 506f961d..93d2a218 100644
--- a/test/bitarray.jl
+++ b/test/bitarray.jl
@@ -1,6 +1,6 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-module BitArray
+module TestBitArray
 
 prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
 !isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")

From 8b1e5215032535700cc70a0680020bb71dbfd893 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Sun, 4 May 2025 20:55:36 +0530
Subject: [PATCH 03/12] Test commit: unset ENV variable

---
 .ci/run_tests.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.ci/run_tests.jl b/.ci/run_tests.jl
index 879b73b1..603c3cf4 100644
--- a/.ci/run_tests.jl
+++ b/.ci/run_tests.jl
@@ -7,4 +7,4 @@ end
 proj = abspath(joinpath(@__DIR__, ".."))
 cmd = """Base.runtests(["LinearAlgebra"]; propagate_project=true, ncores=$ncores)"""
 run(addenv(`$(Base.julia_cmd()) --project=$proj --compiled-modules=existing -e $cmd`,
-    "JULIA_NUM_THREADS" => 1, "JULIA_PRUNE_OLD_LA" => true))
+    "JULIA_NUM_THREADS" => 1))

From 04359c871262cf4c28331deabc5fd0544913eb05 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Sun, 4 May 2025 21:19:02 +0530
Subject: [PATCH 04/12] Revert "Test commit: unset ENV variable"

This reverts commit 8b1e5215032535700cc70a0680020bb71dbfd893.
---
 .ci/run_tests.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.ci/run_tests.jl b/.ci/run_tests.jl
index 603c3cf4..879b73b1 100644
--- a/.ci/run_tests.jl
+++ b/.ci/run_tests.jl
@@ -7,4 +7,4 @@ end
 proj = abspath(joinpath(@__DIR__, ".."))
 cmd = """Base.runtests(["LinearAlgebra"]; propagate_project=true, ncores=$ncores)"""
 run(addenv(`$(Base.julia_cmd()) --project=$proj --compiled-modules=existing -e $cmd`,
-    "JULIA_NUM_THREADS" => 1))
+    "JULIA_NUM_THREADS" => 1, "JULIA_PRUNE_OLD_LA" => true))

From bb18dea5dddc46da542f2b3eeb9dd5a1607336e5 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 10:36:51 +0530
Subject: [PATCH 05/12] Revert "Prune old LA based on ENV variable"

This reverts commit 8f3ab7649e0b67056892be2c13e0495348c31d2a.
---
 test/abstractq.jl           | 3 +--
 test/addmul.jl              | 3 +--
 test/adjtrans.jl            | 3 +--
 test/bidiag.jl              | 3 +--
 test/bitarray.jl            | 5 +----
 test/blas.jl                | 3 +--
 test/bunchkaufman.jl        | 3 +--
 test/cholesky.jl            | 3 +--
 test/dense.jl               | 3 +--
 test/diagonal.jl            | 3 +--
 test/eigen.jl               | 3 +--
 test/factorization.jl       | 3 +--
 test/generic.jl             | 3 +--
 test/givens.jl              | 3 +--
 test/hessenberg.jl          | 3 +--
 test/lapack.jl              | 3 +--
 test/ldlt.jl                | 3 +--
 test/lq.jl                  | 3 +--
 test/lu.jl                  | 3 +--
 test/matmul.jl              | 3 +--
 test/pinv.jl                | 3 +--
 test/prune_old_LA.jl        | 4 +++-
 test/qr.jl                  | 3 +--
 test/runtests.jl            | 3 +--
 test/schur.jl               | 3 +--
 test/special.jl             | 3 +--
 test/structuredbroadcast.jl | 3 +--
 test/svd.jl                 | 3 +--
 test/symmetric.jl           | 3 +--
 test/symmetriceigen.jl      | 3 +--
 test/triangular.jl          | 3 +--
 test/triangular2.jl         | 3 +--
 test/triangular3.jl         | 3 +--
 test/tridiag.jl             | 3 +--
 test/uniformscaling.jl      | 3 +--
 test/unitful.jl             | 3 +--
 36 files changed, 38 insertions(+), 73 deletions(-)

diff --git a/test/abstractq.jl b/test/abstractq.jl
index d59d1b39..ff1499ae 100644
--- a/test/abstractq.jl
+++ b/test/abstractq.jl
@@ -2,8 +2,7 @@
 
 module TestAbstractQ
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test
 using LinearAlgebra
diff --git a/test/addmul.jl b/test/addmul.jl
index 803f72c9..f6b49d4e 100644
--- a/test/addmul.jl
+++ b/test/addmul.jl
@@ -2,8 +2,7 @@
 
 module TestAddmul
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Base: rtoldefault
 using Test
diff --git a/test/adjtrans.jl b/test/adjtrans.jl
index e5594468..975e9a44 100644
--- a/test/adjtrans.jl
+++ b/test/adjtrans.jl
@@ -2,8 +2,7 @@
 
 module TestAdjointTranspose
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/bidiag.jl b/test/bidiag.jl
index 639e38ac..209fb024 100644
--- a/test/bidiag.jl
+++ b/test/bidiag.jl
@@ -2,8 +2,7 @@
 
 module TestBidiagonal
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasReal, BlasFloat
diff --git a/test/bitarray.jl b/test/bitarray.jl
index 93d2a218..9f5e3ee9 100644
--- a/test/bitarray.jl
+++ b/test/bitarray.jl
@@ -2,8 +2,7 @@
 
 module TestBitArray
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using LinearAlgebra, Test, Random
 
@@ -100,5 +99,3 @@ b2 = bitrand(v1)
 
 b1 = bitrand(n1, n1)
 @check_bit_operation diag(b1)
-
-end
diff --git a/test/blas.jl b/test/blas.jl
index 75bffeb7..b7f4a03a 100644
--- a/test/blas.jl
+++ b/test/blas.jl
@@ -2,8 +2,7 @@
 
 module TestBLAS
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasReal, BlasComplex
diff --git a/test/bunchkaufman.jl b/test/bunchkaufman.jl
index b87a1264..cf4fa488 100644
--- a/test/bunchkaufman.jl
+++ b/test/bunchkaufman.jl
@@ -2,8 +2,7 @@
 
 module TestBunchKaufman
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted
diff --git a/test/cholesky.jl b/test/cholesky.jl
index 5ea1697c..c03ec3f0 100644
--- a/test/cholesky.jl
+++ b/test/cholesky.jl
@@ -2,8 +2,7 @@
 
 module TestCholesky
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted,
diff --git a/test/dense.jl b/test/dense.jl
index e89ea819..99e0b429 100644
--- a/test/dense.jl
+++ b/test/dense.jl
@@ -2,8 +2,7 @@
 
 module TestDense
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal
diff --git a/test/diagonal.jl b/test/diagonal.jl
index 051b77ff..2b7cfd4d 100644
--- a/test/diagonal.jl
+++ b/test/diagonal.jl
@@ -2,8 +2,7 @@
 
 module TestDiagonal
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasFloat, BlasComplex
diff --git a/test/eigen.jl b/test/eigen.jl
index e1544353..67e58d34 100644
--- a/test/eigen.jl
+++ b/test/eigen.jl
@@ -2,8 +2,7 @@
 
 module TestEigen
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted, UtiAUi!
diff --git a/test/factorization.jl b/test/factorization.jl
index 01e6fe68..b215c246 100644
--- a/test/factorization.jl
+++ b/test/factorization.jl
@@ -2,8 +2,7 @@
 
 module TestFactorization
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/generic.jl b/test/generic.jl
index a2103e83..521beaf4 100644
--- a/test/generic.jl
+++ b/test/generic.jl
@@ -2,8 +2,7 @@
 
 module TestGeneric
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using Test: GenericArray
diff --git a/test/givens.jl b/test/givens.jl
index c309c933..fb09ec4e 100644
--- a/test/givens.jl
+++ b/test/givens.jl
@@ -2,8 +2,7 @@
 
 module TestGivens
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: Givens, Rotation, givensAlgorithm
diff --git a/test/hessenberg.jl b/test/hessenberg.jl
index b6cd6aa1..8485c014 100644
--- a/test/hessenberg.jl
+++ b/test/hessenberg.jl
@@ -2,8 +2,7 @@
 
 module TestHessenberg
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/lapack.jl b/test/lapack.jl
index 5cd95c50..12ed2145 100644
--- a/test/lapack.jl
+++ b/test/lapack.jl
@@ -2,8 +2,7 @@
 
 module TestLAPACK
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasInt
diff --git a/test/ldlt.jl b/test/ldlt.jl
index eb15679d..3454ef43 100644
--- a/test/ldlt.jl
+++ b/test/ldlt.jl
@@ -2,8 +2,7 @@
 
 module TestLDLT
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/lq.jl b/test/lq.jl
index fa364891..0d55f84f 100644
--- a/test/lq.jl
+++ b/test/lq.jl
@@ -2,8 +2,7 @@
 
 module TestLQ
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, rmul!, lmul!
diff --git a/test/lu.jl b/test/lu.jl
index b496886b..ba869032 100644
--- a/test/lu.jl
+++ b/test/lu.jl
@@ -2,8 +2,7 @@
 
 module TestLU
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: ldiv!, BlasReal, BlasInt, BlasFloat, rdiv!
diff --git a/test/matmul.jl b/test/matmul.jl
index 9eff42a2..d9635123 100644
--- a/test/matmul.jl
+++ b/test/matmul.jl
@@ -2,8 +2,7 @@
 
 module TestMatmul
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Base: rtoldefault
 using Test, LinearAlgebra, Random
diff --git a/test/pinv.jl b/test/pinv.jl
index 9495e4d8..ecee397a 100644
--- a/test/pinv.jl
+++ b/test/pinv.jl
@@ -2,8 +2,7 @@
 
 module TestPinv
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/prune_old_LA.jl b/test/prune_old_LA.jl
index f628cddf..5fb712f5 100644
--- a/test/prune_old_LA.jl
+++ b/test/prune_old_LA.jl
@@ -48,9 +48,11 @@ methods_to_delete =
 :acsch
 ]
 
+prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+
 let
     LA = get(Base.loaded_modules, Base.PkgId(Base.UUID("37e2e46d-f89d-539d-b4ee-838fcccc9c8e"), "LinearAlgebra"), nothing)
-    if LA !== nothing
+    if LA !== nothing && prune_old_LA
         @assert hasmethod(*, Tuple{Matrix{Float64}, Matrix{Float64}})
         for methss in methods_to_delete
             meths = getglobal(Base, methss)
diff --git a/test/qr.jl b/test/qr.jl
index f17f1438..2b121ca4 100644
--- a/test/qr.jl
+++ b/test/qr.jl
@@ -2,8 +2,7 @@
 
 module TestQR
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted, rmul!, lmul!
diff --git a/test/runtests.jl b/test/runtests.jl
index 36347e75..d9539fba 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,7 +1,6 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-prune_old_LA && include("prune_old_LA.jl")
+include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/schur.jl b/test/schur.jl
index 8ebf802f..e0a16b80 100644
--- a/test/schur.jl
+++ b/test/schur.jl
@@ -2,8 +2,7 @@
 
 module TestSchur
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted
diff --git a/test/special.jl b/test/special.jl
index 79926c4f..aaad97b3 100644
--- a/test/special.jl
+++ b/test/special.jl
@@ -2,8 +2,7 @@
 
 module TestSpecial
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: rmul!, BandIndex
diff --git a/test/structuredbroadcast.jl b/test/structuredbroadcast.jl
index 22858d73..e4930a65 100644
--- a/test/structuredbroadcast.jl
+++ b/test/structuredbroadcast.jl
@@ -2,8 +2,7 @@
 
 module TestStructuredBroadcast
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 
diff --git a/test/svd.jl b/test/svd.jl
index bfd6cbd6..fdcfcb30 100644
--- a/test/svd.jl
+++ b/test/svd.jl
@@ -2,8 +2,7 @@
 
 module TestSVD
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: BlasComplex, BlasFloat, BlasReal, QRPivoted
diff --git a/test/symmetric.jl b/test/symmetric.jl
index f624b2d2..c6b6fdc4 100644
--- a/test/symmetric.jl
+++ b/test/symmetric.jl
@@ -2,8 +2,7 @@
 
 module TestSymmetric
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/symmetriceigen.jl b/test/symmetriceigen.jl
index 6d94eaf4..5af72b3a 100644
--- a/test/symmetriceigen.jl
+++ b/test/symmetriceigen.jl
@@ -2,8 +2,7 @@
 
 module TestSymmetricEigen
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra
 using LinearAlgebra: DivideAndConquer, QRIteration, RobustRepresentations
diff --git a/test/triangular.jl b/test/triangular.jl
index 054e7f9c..642411fe 100644
--- a/test/triangular.jl
+++ b/test/triangular.jl
@@ -2,8 +2,7 @@
 
 module TestTriangular
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 using LinearAlgebra: errorbounds, transpose!, BandIndex
diff --git a/test/triangular2.jl b/test/triangular2.jl
index cf29b8eb..8740ff8d 100644
--- a/test/triangular2.jl
+++ b/test/triangular2.jl
@@ -2,8 +2,7 @@
 
 module TestTriangularReal
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Random
 
diff --git a/test/triangular3.jl b/test/triangular3.jl
index ba5780e4..9a29d681 100644
--- a/test/triangular3.jl
+++ b/test/triangular3.jl
@@ -2,8 +2,7 @@
 
 module TestTriangularComplex
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Random
 
diff --git a/test/tridiag.jl b/test/tridiag.jl
index 4d5455d9..423012c8 100644
--- a/test/tridiag.jl
+++ b/test/tridiag.jl
@@ -2,8 +2,7 @@
 
 module TestTridiagonal
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/uniformscaling.jl b/test/uniformscaling.jl
index 8b455b00..21bd4b80 100644
--- a/test/uniformscaling.jl
+++ b/test/uniformscaling.jl
@@ -2,8 +2,7 @@
 
 module TestUniformscaling
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 
diff --git a/test/unitful.jl b/test/unitful.jl
index 786f165a..87c153c2 100644
--- a/test/unitful.jl
+++ b/test/unitful.jl
@@ -1,7 +1,6 @@
 module TestUnitfulLinAlg
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
-!isdefined(Main, :pruned_old_LA) && prune_old_LA && @eval Main include("prune_old_LA.jl")
+isdefined(Main, :pruned_old_LA) || @eval Main include("prune_old_LA.jl")
 
 using Test, LinearAlgebra, Random
 

From 441d49e5968c4a7c170535730cd8de21c986b901 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 11:48:01 +0530
Subject: [PATCH 06/12] End `TestBitAray` module

---
 test/bitarray.jl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/bitarray.jl b/test/bitarray.jl
index 9f5e3ee9..10b9d4b8 100644
--- a/test/bitarray.jl
+++ b/test/bitarray.jl
@@ -99,3 +99,5 @@ b2 = bitrand(v1)
 
 b1 = bitrand(n1, n1)
 @check_bit_operation diag(b1)
+
+end # module

From c74c541414ebb9839757da8602e0d905de6264ab Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 13:53:13 +0530
Subject: [PATCH 07/12] Add env var to docs and update Readme

---
 README.md    | 18 ++++++++++++++++--
 docs/make.jl |  1 +
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index a39a7248..bca69d8e 100644
--- a/README.md
+++ b/README.md
@@ -37,10 +37,24 @@ This package performs some type piracy and is also included in the sysimage, whi
 To use a development version of this package, you can choose one of the following methods:
 
 1. **Change the UUID in the project file and load the package:**
-   This approach will produce warnings and may lead to method ambiguities between the development version and the one in the sysimage, but it can be used for basic experimentation.
+
+   Start `julia` as
+   ```julia
+   JULIA_PRUNE_OLD_LA=true julia +nightly --compiled-modules=existing --project
+   ```
+   where it is assumed that one is already within the `LinearAlgebra` directory. Otherwise, adjust
+   the project path accordingly. The `julia +nightly` command above assumes that `juliaup` is being used
+   to launch `julia`, but one may substitute this with the path to the julia executable.
+
+   Within the `julia` session, load the `LinearAlgebra` module after pruning the one in the sysimage. This may be done as
+   ```julia
+   include("test/prune_old_LA.jl") && using LinearAlgebra
+   ```
 
 2. **Build Julia with the custom `LinearAlgebra` commit:**
-   Modify the commit in `stdlib/LinearAlgebra.version` and build Julia.
+
+   Modify the commit in [`stdlib/LinearAlgebra.version`](https://github.com/JuliaLang/julia/blob/master/stdlib/LinearAlgebra.version) and build Julia. This requires one to push the development branch
+   to `GitHub` or an equivalent platform.
 
 3. **Build a custom sysimage with the new `LinearAlgebra`:**
    - Install `PackageCompiler`.
diff --git a/docs/make.jl b/docs/make.jl
index a1d3a2d0..7acd964d 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -1,3 +1,4 @@
+ENV["JULIA_PRUNE_OLD_LA"] = "true"
 include("../test/prune_old_LA.jl")
 
 using LinearAlgebra

From 0d965c467a5f866df7c55581a184a0c80f923843 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 17:12:06 +0530
Subject: [PATCH 08/12] assert `!hasmethod` if methods pruned

---
 docs/make.jl         |  5 +++--
 test/prune_old_LA.jl | 17 +++++++++++++----
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/docs/make.jl b/docs/make.jl
index 7acd964d..b3db7ce7 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -1,5 +1,6 @@
-ENV["JULIA_PRUNE_OLD_LA"] = "true"
-include("../test/prune_old_LA.jl")
+withenv("JULIA_PRUNE_OLD_LA" => "true")
+    include("../test/prune_old_LA.jl")
+end
 
 using LinearAlgebra
 using Documenter: DocMeta, makedocs, deploydocs, HTML
diff --git a/test/prune_old_LA.jl b/test/prune_old_LA.jl
index 5fb712f5..aafdebaa 100644
--- a/test/prune_old_LA.jl
+++ b/test/prune_old_LA.jl
@@ -48,10 +48,11 @@ methods_to_delete =
 :acsch
 ]
 
-prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
 
 let
-    LA = get(Base.loaded_modules, Base.PkgId(Base.UUID("37e2e46d-f89d-539d-b4ee-838fcccc9c8e"), "LinearAlgebra"), nothing)
+    prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+    LinalgSysImg = Base.PkgId(Base.UUID("37e2e46d-f89d-539d-b4ee-838fcccc9c8e"), "LinearAlgebra")
+    LA = get(Base.loaded_modules, LinalgSysImg, nothing)
     if LA !== nothing && prune_old_LA
         @assert hasmethod(*, Tuple{Matrix{Float64}, Matrix{Float64}})
         for methss in methods_to_delete
@@ -63,9 +64,17 @@ let
             end
         end
     end
-    Base.unreference_module(Base.PkgId(Base.UUID("37e2e46d-f89d-539d-b4ee-838fcccc9c8e"), "LinearAlgebra"))
 end
 
-@assert !hasmethod(*, Tuple{Matrix{Float64}, Matrix{Float64}})
+# check in a separate block to ensure that the latest world age is used
+let
+    prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
+    LinalgSysImg = Base.PkgId(Base.UUID("37e2e46d-f89d-539d-b4ee-838fcccc9c8e"), "LinearAlgebra")
+    LA = get(Base.loaded_modules, LinalgSysImg, nothing)
+    if LA !== nothing && prune_old_LA
+        @assert !hasmethod(*, Tuple{Matrix{Float64}, Matrix{Float64}})
+    end
+    Base.unreference_module(LinalgSysImg)
+end
 
 pruned_old_LA = true

From 9ea3e688924d916a02a63b840bd3d569eb416a2b Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 17:16:07 +0530
Subject: [PATCH 09/12] Fix `withenv` call within `docs/make.jl`

---
 docs/make.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/make.jl b/docs/make.jl
index b3db7ce7..0f8b79d9 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -1,4 +1,4 @@
-withenv("JULIA_PRUNE_OLD_LA" => "true")
+withenv("JULIA_PRUNE_OLD_LA" => "true") do
     include("../test/prune_old_LA.jl")
 end
 

From 451c54f114fdaa4c3b8e33907616f20a56901a24 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 17:46:21 +0530
Subject: [PATCH 10/12] Update Readme instructions

---
 README.md | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index bca69d8e..54083f1a 100644
--- a/README.md
+++ b/README.md
@@ -38,9 +38,9 @@ To use a development version of this package, you can choose one of the followin
 
 1. **Change the UUID in the project file and load the package:**
 
-   Start `julia` as
-   ```julia
-   JULIA_PRUNE_OLD_LA=true julia +nightly --compiled-modules=existing --project
+   Start `julia` with the flags
+   ```console
+   julia +nightly --compiled-modules=existing --project
    ```
    where it is assumed that one is already within the `LinearAlgebra` directory. Otherwise, adjust
    the project path accordingly. The `julia +nightly` command above assumes that `juliaup` is being used
@@ -48,7 +48,10 @@ To use a development version of this package, you can choose one of the followin
 
    Within the `julia` session, load the `LinearAlgebra` module after pruning the one in the sysimage. This may be done as
    ```julia
-   include("test/prune_old_LA.jl") && using LinearAlgebra
+   withenv("JULIA_PRUNE_OLD_LA" => "true") do
+      include("test/prune_old_LA.jl")
+   end
+   using LinearAlgebra
    ```
 
 2. **Build Julia with the custom `LinearAlgebra` commit:**

From c909365689c32e474013b5a28e6cd7f68d9e3ce2 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Mon, 5 May 2025 18:07:03 +0530
Subject: [PATCH 11/12] Update pruning instruction in Readme

---
 README.md | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index 54083f1a..c0951dcc 100644
--- a/README.md
+++ b/README.md
@@ -38,20 +38,30 @@ To use a development version of this package, you can choose one of the followin
 
 1. **Change the UUID in the project file and load the package:**
 
-   Start `julia` with the flags
+   Change the UUID line in `Project.toml` as
+   ```diff
+   - uuid = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+   + uuid = "27e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+   ```
+
+   Start `julia` as
    ```console
-   julia +nightly --compiled-modules=existing --project
+   JULIA_PRUNE_OLD_LA=true julia +nightly --compiled-modules=existing --project
    ```
-   where it is assumed that one is already within the `LinearAlgebra` directory. Otherwise, adjust
-   the project path accordingly. The `julia +nightly` command above assumes that `juliaup` is being used
+   where it is assumed that one is already within the `LinearAlgebra` directory (otherwise, adjust
+   the project path accordingly). The `julia +nightly` command above assumes that `juliaup` is being used
    to launch `julia`, but one may substitute this with the path to the julia executable.
 
    Within the `julia` session, load the `LinearAlgebra` module after pruning the one in the sysimage. This may be done as
    ```julia
-   withenv("JULIA_PRUNE_OLD_LA" => "true") do
-      include("test/prune_old_LA.jl")
-   end
-   using LinearAlgebra
+   include("test/prune_old_LA.jl") && using LinearAlgebra
+   ```
+
+   Note that loading the test files in the REPL will automatically carry out the pruning to ensure that the development version of the package is used in the tests.
+
+   If you are contributing to the repo using this method, it may be convenient to ignore the local changes to `Project.toml` by running
+   ```console
+   git update-index --skip-worktree Project.toml
    ```
 
 2. **Build Julia with the custom `LinearAlgebra` commit:**

From 34b8d7abe01cd02e2206d45823e999661e4b8ccf Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Tue, 6 May 2025 14:56:12 +0530
Subject: [PATCH 12/12] Unreference `LinearAlgebra` only if env var is true

---
 test/prune_old_LA.jl | 103 +++++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 52 deletions(-)

diff --git a/test/prune_old_LA.jl b/test/prune_old_LA.jl
index aafdebaa..7e64cfa3 100644
--- a/test/prune_old_LA.jl
+++ b/test/prune_old_LA.jl
@@ -1,55 +1,54 @@
-methods_to_delete =
-[
-:adjoint
-:transpose
-:inv
-:literal_pow
-:\
-:/
-:isapprox
-:copyto!
-:*
-:muladd
-:copyto!
-:isone
-:kron!
-:kron
-:^
-:exp
-:cis
-:log
-:sqrt
-:cbrt
-:inv
-:cos
-:sin
-:sincos
-:tan
-:cosh
-:sinh
-:tanh
-:acos
-:asin
-:atan
-:acosh
-:asinh
-:atanh
-:sec
-:sech
-:csc
-:csch
-:cot
-:coth
-:asec
-:asech
-:acsc
-:acot
-:acoth
-:acsch
-]
-
-
 let
+    methods_to_delete =
+    [
+    :adjoint
+    :transpose
+    :inv
+    :literal_pow
+    :\
+    :/
+    :isapprox
+    :copyto!
+    :*
+    :muladd
+    :copyto!
+    :isone
+    :kron!
+    :kron
+    :^
+    :exp
+    :cis
+    :log
+    :sqrt
+    :cbrt
+    :inv
+    :cos
+    :sin
+    :sincos
+    :tan
+    :cosh
+    :sinh
+    :tanh
+    :acos
+    :asin
+    :atan
+    :acosh
+    :asinh
+    :atanh
+    :sec
+    :sech
+    :csc
+    :csch
+    :cot
+    :coth
+    :asec
+    :asech
+    :acsc
+    :acot
+    :acoth
+    :acsch
+    ]
+
     prune_old_LA = parse(Bool, get(ENV, "JULIA_PRUNE_OLD_LA", "false"))
     LinalgSysImg = Base.PkgId(Base.UUID("37e2e46d-f89d-539d-b4ee-838fcccc9c8e"), "LinearAlgebra")
     LA = get(Base.loaded_modules, LinalgSysImg, nothing)
@@ -74,7 +73,7 @@ let
     if LA !== nothing && prune_old_LA
         @assert !hasmethod(*, Tuple{Matrix{Float64}, Matrix{Float64}})
     end
-    Base.unreference_module(LinalgSysImg)
+    prune_old_LA && Base.unreference_module(LinalgSysImg)
 end
 
 pruned_old_LA = true