--- theano/gof/utils.py.orig	2020-12-14 05:42:43.000000000 -0700
+++ theano/gof/utils.py	2021-06-08 12:45:23.976560620 -0600
@@ -42,7 +42,7 @@ def simple_extract_stack(f=None, limit=N
         filename = co.co_filename
         name = co.co_name
         #        linecache.checkcache(filename)
-        line = linecache.getline(filename, lineno, f.f_globals)
+        line = linecache.getline(filename, lineno, f.f_globals) if lineno else None
         if line:
             line = line.strip()
         else: