[stable-2.13] Fix sanity test crash. (#77475)

(cherry picked from commit 6216c9fc93)

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/77465-ansible-test-compile-crash.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "ansible-test compile sanity test - do not crash if a column could not be determined for an error (https://github.com/ansible/ansible/pull/77465)."

test/lib/ansible_test/_util/target/sanity/compile/compile.py

@@ -24,6 +24,10 @@ def main():
         else:
             continue
 
+        # In some situations offset can be None. This can happen for syntax errors on Python 2.6
+        # (__future__ import following after a regular import).
+        offset = offset or 0
+
         result = "%s:%d:%d: %s: %s" % (path, lineno, offset, extype.__name__, safe_message(message))
 
         if sys.version_info <= (3,):