https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115296
--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>: https://gcc.gnu.org/g:f70281222df432a7bec1271904c5ebefd7f2c934 commit r15-2229-gf70281222df432a7bec1271904c5ebefd7f2c934 Author: Patrick Palka <ppa...@redhat.com> Date: Tue Jul 23 11:37:31 2024 -0400 c++: missing SFINAE during alias CTAD [PR115296] During the alias CTAD transformation, if substitution failed for some guide we should just silently discard the guide. We currently do discard the guide, but not silently, as in the below testcase which we diagnose forming a too-large array type when transforming the user-defined deduction guides. This patch fixes this by using complain=tf_none instead of tf_warning_or_error throughout alias_ctad_tweaks. PR c++/115296 gcc/cp/ChangeLog: * pt.cc (alias_ctad_tweaks): Use complain=tf_none instead of tf_warning_or_error. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/class-deduction-alias23.C: New test. Reviewed-by: Jason Merrill <ja...@redhat.com>
