From c65e43e85e3a4e5b0e4384189d9a3837038e3fce Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Thu, 15 Nov 2018 10:17:00 -0800
Subject: [PATCH] Do not close over program in getSourceFileLike

---
 src/services/sourcemaps.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/services/sourcemaps.ts b/src/services/sourcemaps.ts
index 92ebcc8c261..9de8557cd19 100644
--- a/src/services/sourcemaps.ts
+++ b/src/services/sourcemaps.ts
@@ -39,9 +39,10 @@ namespace ts {
                 // obviously invalid map
                 return file.sourceMapper = identitySourceMapConsumer;
             }
-            const program = getProgram();
+
             return file.sourceMapper = createDocumentPositionMapper({
                 getSourceFileLike: s => {
+                    const program = getProgram();
                     // Lookup file in program, if provided
                     const file = program && program.getSourceFileByPath(s);
                     // file returned here could be .d.ts when asked for .ts file if projectReferences and module resolution created this source file