Index: compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp
+++ compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp
@@ -356,7 +356,7 @@
       InternalFree(info->function);
       info->function = 0;
     }
-    if (0 == internal_strcmp(info->file, "??")) {
+    if (info->file && 0 == internal_strcmp(info->file, "??")) {
       InternalFree(info->file);
       info->file = 0;
     }