https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62132
--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Per comments 6 and 7 I have tried --- ../_clean/gcc/testsuite/c-c++-common/asan/misalign-1.c 2014-05-31 12:40:03.000000000 +0200 +++ gcc/testsuite/c-c++-common/asan/misalign-1.c 2014-11-05 14:35:09.000000000 +0100 @@ -1,6 +1,7 @@ /* { dg-do run { target { ilp32 || lp64 } } } */ /* { dg-options "-O2" } */ /* { dg-shouldfail "asan" } */ +/* { dg-additional-options "-funwind-tables" { target *-*-darwin* } } */ struct S { int i; } __attribute__ ((packed)); but it does not fix the failures. What am I misunderstanding?