From 46a12fdb8ac36db7ace0fdf1929e1b25600ccce7 Mon Sep 17 00:00:00 2001
From: Joel Einbinder <joel.einbinder@gmail.com>
Date: Fri, 1 Oct 2021 08:16:05 -0400
Subject: [PATCH] fix(sourcemap): accept a sourceMappingURL that ends with a
 newline (#45983)

* fix(sourcemap): accept a sourceMappingURL that ends with a newline

* Update src/compiler/sourcemap.ts

Co-authored-by: Wesley Wigham <wwigham@gmail.com>
---
 src/compiler/sourcemap.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/sourcemap.ts b/src/compiler/sourcemap.ts
index ed75cf081d9..e3aebc849b6 100644
--- a/src/compiler/sourcemap.ts
+++ b/src/compiler/sourcemap.ts
@@ -322,7 +322,8 @@ namespace ts {
     }
 
     // Sometimes tools can see the following line as a source mapping url comment, so we mangle it a bit (the [M])
-    const sourceMapCommentRegExp = /^\/\/[@#] source[M]appingURL=(.+)$/;
+    const sourceMapCommentRegExp = /^\/\/[@#] source[M]appingURL=(.+)\r?\n?$/;
+
     const whitespaceOrMapCommentRegExp = /^\s*(\/\/[@#] .*)?$/;
 
     export interface LineInfo {