From 5cf202ead1aeca4beaddf3a73d562173087b20de Mon Sep 17 00:00:00 2001
From: Dan Freeman <dfreeman@salsify.com>
Date: Mon, 4 Jun 2018 13:45:52 -0400
Subject: [PATCH] Avoid an infinite loop when requesting compiler options

---
 lib/incremental-typescript-compiler/index.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/incremental-typescript-compiler/index.js b/lib/incremental-typescript-compiler/index.js
index a9dc7b63f..1ea85bcab 100644
--- a/lib/incremental-typescript-compiler/index.js
+++ b/lib/incremental-typescript-compiler/index.js
@@ -29,6 +29,7 @@ module.exports = class IncrementalTypescriptCompiler {
 
     this._ts = project.require('typescript');
     this._watchProgram = null;
+    this._compilerOptions = null;
   }
 
   treeForHost() {
@@ -115,6 +116,10 @@ module.exports = class IncrementalTypescriptCompiler {
         }
       }
     });
+
+    // Prefetch the compiler options, because fetching them while reporting a diagnostic
+    // can result in a diagnostic-reporting loop in certain states
+    this._compilerOptions = this.getProgram().getCompilerOptions();
   }
 
   getProgram() {
@@ -130,8 +135,7 @@ module.exports = class IncrementalTypescriptCompiler {
   }
 
   _shouldFailOnTypeError() {
-    let options = this.getProgram().getCompilerOptions();
-    return !!options.noEmitOnError;
+    return !!this._compilerOptions.noEmitOnError;
   }
 
   _mirageDirectory() {