Panic in pattern analysis

[Jesse-Bakker]

rust-analyzer version: rust-analyzer 0.0.0 (ce15e73a8e 2024-03-06) (latest commit)

rustc version: rustc 1.76.0 (07dca489a 2024-02-04)

The panic happens inside ra_ap_rustc_pattern_analysis, calling row.head() on an empty row.
CC @Nadrieril

Backtrace

Panic context:
> fetch_native_diagnostics
thread 'Worker' panicked at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:954:18:
index out of bounds: the len is 0 but the index is 0
stack backtrace:
   0:     0x5fb8d0551366 - std::backtrace_rs::backtrace::libunwind::trace::hbee8a7973eeb6c93
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x5fb8d0551366 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8ac75eea3aa6899
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x5fb8d0551366 - std::sys_common::backtrace::_print_fmt::hc7f3e3b5298b1083
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x5fb8d0551366 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hbb235daedd7c6190
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x5fb8d0582490 - core::fmt::rt::Argument
::fmt::h76c38a80d925a410
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/rt.rs:142:9
   5:     0x5fb8d0582490 - core::fmt::write::h3ed6aeaa977c8e45
       
                        at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/mod.rs:1120:17
   6: 
    0x5fb8d054cb4f - std::io::Write::write_fmt::h78b18af5775fedb5
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/io/mod.rs:1810:15
 
  7:     0x5fb8d0551144 - std::sys_common::backtrace::_print::h5d645a07e0fcfdbb
         
                      at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x5fb8d0551144 - std::sys_common::backtrace::
print::h85035a511aafe7a8
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x5fb8d0552f97 - std::panicking::default_hook::{{closure}}::hcce8cea212785a25
  10:     0x5fb8d0552cf9 - std
::panicking::default_hook::hf5fcb0f213fe709a
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:292:9
  11:     0x5fb8d04ce024
 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h2efdf55e5d11e500
         
                      at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2029:9
  12:     0x5fb8d04ce024 - stdx::panic_context::
PanicContext::init::{{closure}}::{{closure}}::h4a896976e0ed3db7
             
                  at /home/jesse/dev/oss/rust-analyzer/crates/stdx/src/panic_context.rs:32:17
  13:     0x5fb8d04ce024 - stdx::panic_context::
with_ctx::{{closure}}::h8997c10eaf44557b
                               at /home/jesse/dev/oss/rust-analyzer/crates/stdx/src/panic_context.rs:
49:20
  14:     0x5fb8d04ce024 - std::thread::local::LocalKey<T>::try_with::hffb693f9da905bec
 
                              at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/local.rs:270:16
  15:     0x5fb8d04ce024 - std::thread::local::LocalKey<T>::with::h140646dc71fc726d
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/local.rs:246:9
  16:     0x5fb8d0553626 - <alloc::boxed::Box<F,A> as core::ops::function::
Fn<Args>>::call::hbc5ccf4eb663e1e5
                               at 
/rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2029:9
  17:     0x5fb8d0553626 - std::panicking::rust_panic_with_hook::h095fccf1dc9379ee
  
                             at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:783:13
  18:     0x5fb8d0553372 - std::panicking::begin_panic_handler::{{closure}}::h032ba12139b353db
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:657:13
  19:     0x5fb8d0551866 - std::sys_common::backtrace::__rust_end_short_backtrace::h9259bc2ff8fd0f76
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:171:18
  20:    
 0x5fb8d05530d0 - rust_begin_unwind
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:645:5
  21:     0x5fb8d057f755 - core::panicking::panic_fmt::h784f20a50eaab275
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panicking.rs:72:14
  22:     0x5fb8d057f992 - core::panicking::panic_bounds_check::h8331054858f0bf20
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panicking.rs:208:5
  23:     0x5fb8cff0200b - 
<usize as core::slice::index::SliceIndex<[T]>>::index::h66d15440063893a8
      
                         at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/slice/index.rs:255:10
  24:     0x5fb8cff0200b - core::slice::
index::<impl core::ops::index::Index<I> for [T]>::index::h4ee4225b01402a97
   
                            at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/slice/index.rs:18:9
  25:     0x5fb8cff0200b - <smallvec::SmallVec<A> as core::ops::index::Index<I>>::index::h028a23b831a2e371
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/smallvec-1.13.1/src/lib.rs
:2030:18
  26:     0x5fb8cff0200b - ra_ap_rustc_pattern_analysis::usefulness::PatStack<Cx>::head::h8eab8a5cdfdafd92
             
                  at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:954:18
  27:     0x5fb8cff0200b - ra_ap_rustc_pattern_analysis::usefulness::MatrixRow<
Cx>::head::hfb234353ae50950a
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1034:19
  28:     0x5fb8cff0200b
 - ra_ap_rustc_pattern_analysis::usefulness::Matrix<Cx>::heads::{{closure}}::hbb6a0e4158115bf1
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1165:31
  29:     0x5fb8cff0200b - core::ops::function::impls::<impl core::ops::function::
FnOnce<A> for &mut F>::call_once::h5ec00a2f00a49549
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:305:13
  30:     0x5fb8cff0200b - core::option::Option<T
>::map::hc42db3c9ccee5156
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/option.rs:1072:29
  31
:     0x5fb8cff0200b - <core::iter::adapters::map::Map<I,F> as core::
iter::traits::iterator::Iterator>::next::ha0c561c9f8230cdb
          
                     at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/adapters/map.rs:104:26
  32:     
0x5fb8cff0200b - <core::iter::adapters::map::Map<I,F> as core::iter::traits::
iterator::Iterator>::next::h6da8fb836dd77ff0
              
                 at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/adapters/map.rs:104:9
  33:     0x5fb8cff0200b - 
<core::iter::adapters::cloned::Cloned<I> as core::iter::traits::iterator::Iterator>::next::h93aba89e372ff69a
   
                            at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/adapters/cloned.rs:40:9
  34: 
    0x5fb8cff0200b - ra_ap_rustc_pattern_analysis::constructor::ConstructorSet<Cx>::split::{{closure}}::hc06b2ee124269949
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/constructor.rs:909:21
  35:     0x5fb8cff0200b - ra_ap_rustc_pattern_analysis::constructor::ConstructorSet<Cx>::split::h41c3c5e43e56c8e0
      
                         at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/constructor.rs:894:5
  36:     0x5fb8cfe717e1 - ra_ap_rustc_pattern_analysis
::usefulness::PlaceInfo<Cx>::split_column_ctors::hf1e14d547fbeca44
                 
              at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:877:29
  37:     0x5fb8cfe717e1 - ra_ap_rustc_pattern_analysis::usefulness::
compute_exhaustiveness_and_usefulness::{{closure}}::hc6776fcd055c7079
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1558
:40
  38:     0x5fb8cfe717e1 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::h7c046c0a59309eb9
         
                      at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1521:1
  39:    
 0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::{{closure}}::{{closure}}::h42716a26f9bc5ce9
    
                           at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1572:13
  40:    
 0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::ensure_sufficient_stack::h0bff5bcdbd08b4ae
                  
             at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:727:5
  41:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::{{
closure}}::hc6776fcd055c7079
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1571:29
  42:    
 0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::h7c046c0a59309eb9
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs
:1521:1
  43:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::{{closure}}::{{closure}
}::h42716a26f9bc5ce9
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1572:13
  44:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::ensure_sufficient_stack::h0bff5bcdbd08b4ae
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:727:5
  45
:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::{{closure}}::hc6776fcd055c7079
                
               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1571:29
  46:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::h7c046c0a59309eb9
         
                      at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1521:1
  47:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::
{{closure}}::{{closure}}::h42716a26f9bc5ce9
                               at 
/home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1572:13
  48:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::ensure_sufficient_stack::h0bff5bcdbd08b4ae
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:727:5
  49:   
  0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis::usefulness::compute_exhaustiveness_and_usefulness::{{closure}}::hc6776fcd055c7079
           
                    at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1571:29
  50:     0x5fb8cfe72728 - ra_ap_rustc_pattern_analysis
::usefulness::compute_exhaustiveness_and_usefulness::h7c046c0a59309eb9
                               at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1521:
1
  51:     0x5fb8cfe70a2a
 - ra_ap_rustc_pattern_analysis::usefulness::compute_match_usefulness::h2e81a6b2f9dc8fbc
             
                  at /home/jesse/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ra-ap-rustc_pattern_analysis-0.40.0/src/usefulness.rs:1677:40
  52:     0x5fb8cfccccd4 - hir_ty
::diagnostics::expr::ExprValidator::validate_block::hd2db7cb6989a2e80
                 
              at /home/jesse/dev/oss/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs:281:32
  53:     0x5fb8cfccccd4 - hir_ty::diagnostics::expr
::ExprValidator::validate_body::hee7650d53357272c
                               at 
/home/jesse/dev/oss/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs:122:21
  54:     0x5fb8cfccccd4 - hir_ty::diagnostics::expr::
BodyValidationDiagnostic::collect::hac4ab1bceea7fd19
                               at /home/jesse/dev/oss/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs:74:
9
  55:     0x5fb8cfc2c212 - hir
::DefWithBody::diagnostics::h7a4411550dc3587f
                               at /home/jesse/dev/oss/rust-analyzer/crates/hir/src/lib.rs:1797
:27
  56:     0x5fb8cfc214ec
 - hir::ModuleDef::diagnostics::h9cb338ec7b890f58
              
                 at /home/jesse/dev/oss/rust-analyzer/crates/hir/src/lib.rs:390:17
  57:     0x5fb8cfc227af
 - hir::Module::diagnostics::h6734faa7877cdcce
            
                   at /home/jesse/dev/oss/rust-analyzer/crates/hir/src/lib.rs:605:33
  58:     
0x5fb8cfc224dd - hir::Module::diagnostics::h6734faa7877cdcce
              
                 at /home/jesse/dev/oss/rust-analyzer/crates/hir/src/lib.rs:566:25
  59:     0x5fb8cf7a7673 - 
ide_diagnostics::diagnostics::he4d1812acb1ab3ba
                               at /home/jesse/dev/oss/rust-analyzer/crates/ide-diagnostics/src/lib.rs
:329:9
  60:     0x5fb8cf60b013
 - ide::Analysis::diagnostics::{{closure}}::h267fee2c66062d41
       
                        at /home/jesse/dev/oss/rust-analyzer/crates/ide/src/lib.rs:652:27
  61:  
   0x5fb8cf60b013 - ide::Analysis::with_db::{{closure}}::h4530d9130f559d7e
   
                            at /home/jesse/dev/oss/rust-analyzer/crates/ide/src/lib.rs:775:29
  62
:     0x5fb8cf60b013 - std::panicking::try::do_call::hc137145cf160520a
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:
552:40
  63:     0x5fb8cf60b013 - std::panicking::try::hbb6f866077113c4a
     
                          at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
  64: 
    0x5fb8cf60b013 - std::panic::catch_unwind::h3f8e61a4c2b6a4e4
          
                     at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
  65:     
0x5fb8cf60b013 - salsa::Cancelled::catch::h6df7eb997b2e836a
                
               at /home/jesse/dev/oss/rust-analyzer/crates/salsa/src/lib.rs:629:15
  66:     0x5fb8cf6942c5 - ide::
Analysis::with_db::h4401967ca28785c1
                               at /home/jesse/dev/oss/rust-analyzer/crates/ide/src/lib.rs:775:9
  67:     0x5fb8cf5fd7cc - 
ide::Analysis::diagnostics::hbadaa49c2fbc4d8e
                  
             at /home/jesse/dev/oss/rust-analyzer/crates/ide/src/lib.rs:652:9
  68:     0x5fb8cf253623 - 
rust_analyzer::diagnostics::fetch_native_diagnostics::{{closure}}::hf5ff6c9b83c2c19a
            
                   at /home/jesse/dev/oss/rust-analyzer/crates/rust-analyzer/src/diagnostics.rs:157:31
  69:     0x5fb8cf253623 - 
core::ops::function::impls::<impl core::ops::function::FnMut<A> for &mut
 F>::call_mut::hfb5bbdf548b06a0d
             
                  at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:294:13
  70:     0x5fb8cf141a17 - core
::iter::traits::iterator::Iterator::find_map::check::{{closure}}::h94696d4ffaf9952f
       
                        at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/traits/iterator.rs:2958:32
  71: 
    0x5fb8cf141a17 - core::iter::adapters::copied::copy_try_fold::{{closure}}::h47d6b3aa5a6fc2d0
 
                              at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/adapters/copied.rs:36:22
  72:     0x5fb8cf141a17 - core::iter::traits::iterator::Iterator::try_fold::h7d5d35cb8c6df314
   
                            at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/traits/iterator.rs:2462:21
  
73:     0x5fb8cf141a17 - <core::iter::adapters::copied::Copied<I> as 
core::iter::traits::iterator::Iterator>::try_fold::h81f9c1037ae2c59a
       
                        at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/adapters/copied.rs:70:9
  74:     0x5fb8cf141a17 - core::iter::traits::iterator
::Iterator::find_map::h6e8990d3c089492d
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/traits/iterator.rs:2964:9
  
75:     0x5fb8cf141a17 - <core::iter::adapters::filter_map::FilterMap<I,F> as core::iter
::traits::iterator::Iterator>::next::h6a55146bd8035164
            
                   at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/adapters/filter_map.rs:63:9
  76:     
0x5fb8cf141a17 - <alloc::vec::Vec<T> as alloc::vec::spec_from_iter_nested::SpecFromIterNested<T,I>>::from_iter::hed0a194dd4a9c2e1
    
                           at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/vec/spec_from_iter_nested.rs:26:32
  77:  
   0x5fb8cf141a17 - <alloc::vec::Vec<T> as alloc::vec::spec_from_iter::SpecFromIter<T
,I>>::from_iter::h1e40a3d6eb95ba4b
              
                 at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/vec/spec_from_iter.rs:33:9
  78:     0x5fb8cf2e12c2 - <alloc::vec::Vec<
T> as core::iter::traits::collect::FromIterator<T>>::from_iter::h5a47058b2a93d9a6
   
                            at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/vec/mod.rs:2791:9
 
 79:     0x5fb8cf2e12c2 - core::iter::traits::iterator::Iterator::collect::h80499f96322fa86a
     
                          at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/iter/traits/iterator.rs:2054:9
  80: 
    0x5fb8cf2e12c2 - rust_analyzer::diagnostics::fetch_native_diagnostics::hf84832a501a147b1
           
                    at /home/jesse/dev/oss/rust-analyzer/crates/rust-analyzer/src/diagnostics.rs:152:27
  81:     0x5fb8cf33fe7d - 
rust_analyzer::main_loop::<impl rust_analyzer::global_state::GlobalState>::update_diagnostics::{{closure}}::h60b14bc62b34a89f
                               at /home/jesse/dev/oss/rust-analyzer/crates/rust-analyzer/src/main_loop.rs:511:39
  
82:     0x5fb8cf33fe7d - rust_analyzer::task_pool::TaskPool<T>::spawn::{{closure}}
::h82f3c00bf4ce6acc
                               at /home/jesse/dev/oss/rust-analyzer/crates/rust-analyzer/src/task_pool.rs:
26:33
  83:     0x5fb8cf33fe7d - stdx::thread::pool::Pool::
spawn::{{closure}}::ha19c5b24d5c9266d
           
                    at /home/jesse/dev/oss/rust-analyzer/crates/stdx/src/thread/pool.rs:82:13
  84:     0x
5fb8cf33fe7d - core::ops::function::FnOnce::call_once{{vtable.shim}}::haaa67dc5ec33554e
          
                     at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
  85:     0x5fb8d04c8216 - <alloc
::boxed::Box<F,A> as core::ops::function::FnOnce<Args
>>::call_once::h1e06e9ec27a44305
               
                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2015:9
  86:     0x5fb8d04c8216 - stdx
::thread::pool::Pool::new::{{closure}}::h2ce16c3d197219d5
         
                      at /home/jesse/dev/oss/rust-analyzer/crates/stdx/src/thread/pool.rs:61:29
  87:   
  0x5fb8d04c8216 - stdx::thread::Builder::spawn::{{closure}}::h127afa68e6998269
   
                            at /home/jesse/dev/oss/rust-analyzer/crates/stdx/src/thread.rs:66:13
  
88:     0x5fb8d04c8216 - std::sys_common::backtrace::__rust_begin_short_backtrace::h0be81a1552f39324
          
                     at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:155:18
  89:     0x5fb8d04d0859 - 
std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha3316839910111c4
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/mod.rs:
529:17
  90:     0x5fb8d04d0859 - <core::panic::unwind_safe::AssertUnwindSafe<F
> as core::ops::function::FnOnce<()>>::call_once::hd871ea900dc266f2
   
                            at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panic/unwind_safe.rs:272:9
 
 91:     0x5fb8d04d0859 - std::panicking::try::do_call::he3be10e6d1d7f1f2
     
                          at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
  92
:     0x5fb8d04d0859 - std::panicking::try::h8d750b6b6a1c2f0f
         
                      at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
  93:     0x5fb8d04d0859 - std::panic
::catch_unwind::h73f10e3b705841a0
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
  94:     0x5fb8d04d0859 - std::thread::Builder::spawn_unchecked_::{{closure}}::h10701b680b31587f
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/mod.rs:528
:30
  95:     0x5fb8d04d0859 - core::ops::function::FnOnce::call_once
{{vtable.shim}}::hf15aec3d962d4072
              
                 at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
  96:     0x5fb8d05596c5 - <
alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>
>::call_once::h12de4fc57affb195
                               at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs
:2015:9
  97:     0x5fb8d05596c5 - <alloc::boxed::Box<F,A> as 
core::ops::function::FnOnce<Args>>::call_once::h3c619f45059d5cf1
      
                         at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2015:9
  98: 
    0x5fb8d05596c5 - std::sys::unix::thread::Thread::new::thread_start::hbac657605e4b7389
   
                            at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys/unix/thread.rs:108:17
  99:     0x7fd20e9d255a - <unknown>
 100:     0x7fd20ea4fa3c - <unknown>
 101:      
          0x0 - <unknown>

Unfortunately, I don't have a public or small reproducer 😞

[Nadrieril]

Sounds like #16746! A fix is on its way :)

[Jesse-Bakker]

Sorry, I looked at that issue and thought that "Fix in about a week" meant that the fix was already in RA, but it's not released as a stable RA version (and because I used the latest RA commit, that meant that I should have that fix already). I guess this means that it will be fixed when RA is next synced with rustc? In the meantime, I may use a local build with a git-dep on ra_ap_rustc_pattern_analysis from rustc.

Thanks for the reply and all your work on the pattern checking!

[lnicola]

"Fixed on the rustc side" means it's in a crate in the rustc repo. That crate gets published on Sunday, but we currently upgrade it manually.

[Nadrieril]

If you try the manual dep on rustc_pattern_analysis let me know if that fixes the problem because I haven't actually tested 😇

[lnicola]

That will require updating ctor_sub_tys to match https://github.com/rust-lang/rust/blob/be31b6b6cdfd0d614a22214391b91070fe55d89e/compiler/rustc_pattern_analysis/src/rustc.rs#L194 because the return type has changed.

[Nadrieril]

Could we actually trigger an early auto-publish? Lotsa people seem to be hitting this. Idk what the policy is

[lnicola]

I just did, but the change to ctor_sub_tys predates the fix for this issue, and we haven't upgraded yet.

[Nadrieril]

Thank you! The ctor_sub_tys change was a tricky one I had to do myself. Done now, #16778 hopefully fixes this (or reveals yet another panic x))