From 228679871ad0140a77064341dc957ae45ab5aefa Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Mon, 4 Oct 2021 12:40:27 -0700
Subject: [PATCH] Limit package.json realpath lookup to only successful
 resolutions

---
 src/compiler/tsbuildPublic.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/tsbuildPublic.ts b/src/compiler/tsbuildPublic.ts
index 3f0e366be3afe..e01810b5d714e 100644
--- a/src/compiler/tsbuildPublic.ts
+++ b/src/compiler/tsbuildPublic.ts
@@ -874,7 +874,7 @@ namespace ts {
             );
             state.lastCachedPackageJsonLookups.set(projectPath, state.moduleResolutionCache && map(
                 state.moduleResolutionCache.getPackageJsonInfoCache().entries(),
-                ([path, data]) => ([state.host.realpath ? toPath(state, state.host.realpath(path)) : path, data] as const)
+                ([path, data]) => ([state.host.realpath && data ? toPath(state, state.host.realpath(path)) : path, data] as const)
             ));
 
             if (state.watch) {