On 10 March 2014 13:36, Markus Armbruster <arm...@redhat.com> wrote: > Peter Maydell <peter.mayd...@linaro.org> writes: > Turns out my clang installation doesn't support -fsanitize=undefined: it > lacks libclang_rt.san-x86_64.a. > > Test works fine without -fsanitize=undefined. I set a breakpoint on > visit_type_UserDefA_fields, and there's no null pointer to be found.
Yes, there is. This is gdb on a gcc-compiled version of the test: /visitor/input-strict/fail/union-flat: Breakpoint 1, visit_type_UserDefA_fields (m=0x5555557a8ed0, obj=0x5555557a8d88, errp=0x7fffffffdfb0) at tests/test-qapi-visit.c:460 460 { (gdb) print *obj $3 = (UserDefA *) 0x0 (gdb) bt #0 visit_type_UserDefA_fields (m=0x5555557a8ed0, obj=0x5555557a8d88, errp=0x7fffffffdfb0) at tests/test-qapi-visit.c:460 #1 0x000055555555b2a2 in visit_type_UserDefFlatUnion (m=0x5555557a8ed0, obj=0x7fffffffdfd8, name=0x0, errp=0x0) at tests/test-qapi-visit.c:654 #2 0x0000555555558c0b in qapi_free_UserDefFlatUnion (obj=0x5555557a8d80) at tests/test-qapi-types.c:368 #3 0x000055555555cc47 in test_validate_fail_union_flat (data=0x5555557a8de0, unused=0x7fffffffe3f0) at /home/petmay01/linaro/qemu-from-laptop/qemu/tests/test-qmp-input-strict.c:241 *obj is NULL, which is what clang is complaining about. thanks -- PMM