From 34988fd49e0deca1adffd20046fa1af2077c6ee8 Mon Sep 17 00:00:00 2001
From: TypeScript Bot <ts_bot@rcavanaugh.com>
Date: Tue, 5 Oct 2021 17:42:01 -0700
Subject: [PATCH] Cherry-pick PR #46209 into release-4.4 (#46230)

Component commits:
228679871a Limit package.json realpath lookup to only successful resolutions

Co-authored-by: Wesley Wigham <t-weswig@microsoft.com>
---
 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 5284be22787b2..2d02637c7ec49 100644
--- a/src/compiler/tsbuildPublic.ts
+++ b/src/compiler/tsbuildPublic.ts
@@ -873,7 +873,7 @@ 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) {