From b71608195bee6ab649fc4787bd7ce9c933e56844 Mon Sep 17 00:00:00 2001
From: Alan Agius <alanagius@google.com>
Date: Wed, 18 May 2022 12:40:42 +0000
Subject: [PATCH] fix(@angular-devkit/build-angular): close compiler on Karma
 exit

The webpack compiler was never closed which caused Webpack's shutdown hook https://github.com/angular/angular-cli/blob/c71832f3a9942aeb2c3dbd62f6edb4f0b8366465/packages/angular_devkit/build_angular/src/webpack/configs/styles.ts#L113-L114 to never be called and in turn caused the Sass workers never to be termined.
---
 .../build_angular/src/webpack/plugins/karma/karma.ts            | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/angular_devkit/build_angular/src/webpack/plugins/karma/karma.ts b/packages/angular_devkit/build_angular/src/webpack/plugins/karma/karma.ts
index ef429497701a..bfb705f29e26 100644
--- a/packages/angular_devkit/build_angular/src/webpack/plugins/karma/karma.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/plugins/karma/karma.ts
@@ -149,7 +149,7 @@ const init: any = (config: any, emitter: any) => {
   webpackMiddleware = webpackDevMiddleware(compiler, webpackMiddlewareConfig);
   emitter.on('exit', (done: any) => {
     webpackMiddleware.close();
-    done();
+    compiler.close(() => done());
   });
 
   function unblock() {