https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114727
Bug ID: 114727 Summary: ICE with c23 with aligned attribute and .-g Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: muecker at gwdg dot de Target Milestone: --- The following ICEs with -std=c23, -g and checking: #define Y [[gnu::aligned(128)]] extern struct Y foo { int x; } x; struct foo { int x; }; We should probably reject redefinition by having the following in tagged_types_tu_compatible_p. if (TYPE_USER_ALIGN (t1) != TYPE_USER_ALIGN (t2)) data->different_types_p = true;