Index: lib/profile/InstrProfilingFile.c
===================================================================
--- lib/profile/InstrProfilingFile.c
+++ lib/profile/InstrProfilingFile.c
@@ -529,7 +529,9 @@
     PNS = PNS_default;
   }
 
-  parseAndSetFilename(SelectedPat, PNS, 0);
+  /* Pass CopyFilenamePat = 1, to ensure that the filename would be valid at the
+   * moment when __llvm_profile_write_file() gets executed. */
+  parseAndSetFilename(SelectedPat, PNS, 1);
 }
 
 /* This API is directly called by the user application code. It has the