1 files changed, 1 insertions, 0 deletions
diff --git a/platform/core-impl/src/com/intellij/psi/impl/file/impl/FileManagerImpl.java b/platform/core-impl/src/com/intellij/psi/impl/file/impl/FileManagerImpl.java
index 6b2877d83351..e54b200507ca 100644
--- a/platform/core-impl/src/com/intellij/psi/impl/file/impl/FileManagerImpl.java
+++ b/platform/core-impl/src/com/intellij/psi/impl/file/impl/FileManagerImpl.java
@@ -527,6 +527,7 @@ public class FileManagerImpl implements FileManager {
   }
 
   void reloadFromDisk(@NotNull PsiFile file, boolean ignoreDocument) {
+    ApplicationManager.getApplication().assertWriteAccessAllowed();
     VirtualFile vFile = file.getVirtualFile();
     assert vFile != null;