avoid releasing non-existing content

diff --git a/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/LastUnchangedContentTracker.java b/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/LastUnchangedContentTracker.java
index 546fbfbc28d330fee11871d8a806cfd8d7bbc45b..a351d94130efbb01ae9c2caceb655c328fe208dc 100644 (file)
--- a/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/LastUnchangedContentTracker.java
+++ b/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/LastUnchangedContentTracker.java
@@ -46,7 +46,7 @@ public class LastUnchangedContentTracker {
     }
 
     Integer oldContentId = getSavedContentId(file);
-    if (oldContentId != null) {
+    if (oldContentId != null && oldContentId > 0) {
       getFS().releaseContent(oldContentId);
     }