From d92ec6bf100d014d2983a1fcfe73a98ed2ed0253 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Sat, 10 Nov 2012 10:14:45 +0100
Subject: [PATCH] diagnostics for IDEA-94551 assertion
 JavaPsiImplementationHelperImpl.java:142 running tests

---
 .../intellij/psi/impl/JavaPsiImplementationHelperImpl.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java b/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java
index 993e71917652..8b30b996bfe2 100644
--- a/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java
+++ b/java/java-impl/src/com/intellij/psi/impl/JavaPsiImplementationHelperImpl.java
@@ -139,7 +139,9 @@ public class JavaPsiImplementationHelperImpl extends JavaPsiImplementationHelper
     final VirtualFile folder = virtualFile.getParent();
     if (sourceRoot != null && folder != null) {
       String relativePath = VfsUtilCore.getRelativePath(folder, sourceRoot, '/');
-      LOG.assertTrue(relativePath != null);
+      if (relativePath == null) {
+        throw new AssertionError("Null relative path: folder=" + folder + "; root=" + sourceRoot);
+      }
       List<OrderEntry> orderEntries = index.getOrderEntriesForFile(virtualFile);
       if (orderEntries.isEmpty()) {
         LOG.error("Inconsistent: " + DirectoryIndex.getInstance(myProject).getInfoForDirectory(folder).toString());