--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -4771,6 +4771,16 @@ expand_line_sal (struct symtab_and_line sal)
       lineno = sal.line;
       match_filename = sal.symtab->filename;
 
+{ int hack_count = 0;
+      ALL_PSPACES (pspace)
+	ALL_PSPACE_PSYMTABS (pspace, objfile, psymtab)
+	{
+	  if (FILENAME_CMP (match_filename, psymtab->filename) == 0)
+	    hack_count++;
+	}
+if (hack_count > 10) error ("%d hack_count", hack_count);
+}
+
       /* We need to find all symtabs for a file which name
 	 is described by sal.  We cannot just directly
 	 iterate over symtabs, since a symtab might not be