In various tests the main frame is missing or provides a missing/wrong source/line number. This seems to mostly be in ppc64le (replicated on Power9 For now we are working around it by filters or alternative exp files. See commit 04d30049bf9b "Filter away "main" differences in filter_fdleak" And commit e6960c2e41b1 "Add exp and supp patterns for missing main frame for ppc64le"