diff --git a/platform/analysis-api/src/com/intellij/psi/search/scope/packageSet/FilePatternPackageSet.java b/platform/analysis-api/src/com/intellij/psi/search/scope/packageSet/FilePatternPackageSet.java
index f936e50f333e..cffe3ca9f2c9 100644
--- a/platform/analysis-api/src/com/intellij/psi/search/scope/packageSet/FilePatternPackageSet.java
+++ b/platform/analysis-api/src/com/intellij/psi/search/scope/packageSet/FilePatternPackageSet.java
@@ -81,7 +81,9 @@ public class FilePatternPackageSet extends PatternBasedPackageSet {
 
   private boolean fileMatcher(VirtualFile virtualFile, ProjectFileIndex fileIndex, VirtualFile projectBaseDir){
     final String relativePath = getRelativePath(virtualFile, fileIndex, true, projectBaseDir);
-    LOG.assertTrue(relativePath != null, "vFile: " + virtualFile + "; projectBaseDir: " + projectBaseDir + "; content File: "+fileIndex.getContentRootForFile(virtualFile));
+    if (relativePath != null) {
+      LOG.error("vFile: " + virtualFile + "; projectBaseDir: " + projectBaseDir + "; content File: "+fileIndex.getContentRootForFile(virtualFile));
+    }
     return myFilePattern.matcher(relativePath).matches();
   }