From 32cc8e10938631efb34d42427674f9e53a490295 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Wed, 9 Mar 2016 15:35:32 +0100
Subject: [PATCH] don't drop PsiCacheKey cache on any change in a physical file

---
 platform/core-api/src/com/intellij/psi/util/PsiCacheKey.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/core-api/src/com/intellij/psi/util/PsiCacheKey.java b/platform/core-api/src/com/intellij/psi/util/PsiCacheKey.java
index d91e4823c5c0..bd57a08c6ba6 100644
--- a/platform/core-api/src/com/intellij/psi/util/PsiCacheKey.java
+++ b/platform/core-api/src/com/intellij/psi/util/PsiCacheKey.java
@@ -76,7 +76,7 @@ public class PsiCacheKey<T, H extends PsiElement> extends Key<SoftReference<Pair
    */
   private long getModificationCount(@NotNull PsiElement element) {
     PsiFile file = element.getContainingFile();
-    long fileStamp = file == null ? 0 : file.getModificationStamp();
+    long fileStamp = file == null || file.isPhysical() ? 0 : file.getModificationStamp();
     PsiModificationTracker tracker = file == null ? element.getManager().getModificationTracker()
                                                   : file.getManager().getModificationTracker();