skip_backref_sv for EXPORT_FAIL

We should not try to save Exporter::EXPORT_FAIL

Refs: CPANEL-42007
(cherry picked from commit 5fe9e32)
Signed-off-by: Nicolas Rochelemagne <[email protected]>

Author: atoomic

lib/B/C/OverLoad/B/AV.pm

@@ -67,6 +67,9 @@ sub skip_backref_sv {
     return 1 if $name =~ m/::(?:bootstrap)$/;
     return 1 unless key_was_in_starting_stash($name);
 
+    # do not save backref for EXPORT_FAIL
+    return 1 if $name =~ m/::(?:EXPORT_FAIL)$/;
+
     return;
 }