https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114374
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[12/13 Regression] snprintf |[12/13/14 Regression] |Wformat-truncation |snprintf Wformat-truncation Target Milestone|--- |12.4 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- You are invoking UD so a diagnostic is within that constraint. Can you produce a testcase without UD that still shows the issue?