From 3e01546a96d32a7ed88c0fb1cec176ab6de49dd2 Mon Sep 17 00:00:00 2001
From: Michael Arnaldi <arnaldimichael@gmail.com>
Date: Wed, 22 Jun 2022 11:45:18 +0000
Subject: [PATCH] chore: fix watch mode crash (TODO investigate watch mode
 properly)

---
 src/compiler/tsbuildPublic.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/tsbuildPublic.ts b/src/compiler/tsbuildPublic.ts
index e7d4d8196e1..b11524d2277 100644
--- a/src/compiler/tsbuildPublic.ts
+++ b/src/compiler/tsbuildPublic.ts
@@ -1774,8 +1774,8 @@ namespace ts {
     function hasSameBuildInfo(state: SolutionBuilderState, buildInfoCacheEntry: BuildInfoCacheEntry, seenRefs: Set<ResolvedConfigFilePath>, resolvedConfig: ParsedCommandLine, resolvedRefPath: ResolvedConfigFilePath) {
         if (seenRefs.has(resolvedRefPath)) return false;
         seenRefs.add(resolvedRefPath);
-        const refBuildInfo = state.buildInfoCache.get(resolvedRefPath)!;
-        if (refBuildInfo.path === buildInfoCacheEntry.path) return true;
+        const refBuildInfo = state.buildInfoCache.get(resolvedRefPath);
+        if (refBuildInfo && refBuildInfo.path === buildInfoCacheEntry.path) return true;
 
         if (resolvedConfig.projectReferences) {
             // Check references