https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67515
Bug ID: 67515 Summary: "invalid vptr" false positive or crash from ubsan for non-virtual call in initializer list Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: sanitizer Assignee: unassigned at gcc dot gnu.org Reporter: rogero at howzatt dot demon.co.uk CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org Target Milestone: --- Created attachment 36312 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36312&action=edit Sample program showing the false positive and the seg fault ubsan produces a warning at runtime from the attached code and then crashes. The crash is provoked by performing a placement new with a pre-populated buffer, but can occur 'in the wild' depending on what the memory contents are at runtime. Fails with trunk (as at 2015-09-08 using http://melpon.org/wandbox/) and gcc 5.2.0 (This may possibly be related to pr67258)