https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112666
Arvid Jonasson <jonassonarvid02 at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jonassonarvid02 at gmail dot com --- Comment #6 from Arvid Jonasson <jonassonarvid02 at gmail dot com> --- I've submitted a new bug report (bug 116469) that expands on this issue. The zero-initialization behavior appears to also depend on struct composition and array member sizes, not just user-provided constructors.