https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126093
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <[email protected]>: https://gcc.gnu.org/g:91e2f5a8aac9c9825e4a13e8f7451bc6d8f75790 commit r17-3380-g91e2f5a8aac9c9825e4a13e8f7451bc6d8f75790 Author: Jakub Jelinek <[email protected]> Date: Tue Aug 18 17:49:11 2026 +0200 c++: Fix ICE during mangling of a conversion operator function template [PR126093] On Tue, Aug 11, 2026 at 04:25:19PM -0400, Jason Merrill wrote: > On 8/7/26 8:45 AM, Jakub Jelinek wrote: > > We ICE when trying to mangle the TEMPLATE_DECL of a conversion operator, > > because FNDECL_USED_AUTO macro requires FUNCTION_DECL, but here we > > have a TEMPLATE_DECL instead. > > In this case, DECL_CONV_FN_TYPE contains the right type, so this patch > > just guards the FNDECL_USED_AUTO macro use on FUNCTION_DECLs. > > Hmm, if it's valid to get a TEMPLATE_DECL here I think we want to > STRIP_TEMPLATE earlier in the function to avoid the need for this; lots of > other things here seem to assume we're looking at the inner decl. Ok, here is a different patch then to use STRIP_TEMPLATE before calling write_unqualified_name in the {class,function,variable,alias} template, concept, namespace alias and namespace (for the last two STRIP_TEMPLATE will do nothing, so I haven't moved it to a separate handling). 2026-08-17 Jakub Jelinek <[email protected]> PR c++/126093 * mangle.cc (write_reflection): Call write_unqualified_name on STRIP_TEMPLATE (arg) rather than just arg. * g++.dg/reflect/mangle1.C: Add 2 new tests for reflections of conversion templates. Reviewed-by: Jason Merrill <[email protected]>
