https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113908
--- Comment #1 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:9bc6b23d11697545e8a951ccd60691b1e58b98c2 commit r14-8981-g9bc6b23d11697545e8a951ccd60691b1e58b98c2 Author: Patrick Palka <ppa...@redhat.com> Date: Wed Feb 14 10:20:31 2024 -0500 c++: synthesized_method_walk context independence [PR113908] In the second testcase below, during ahead of time checking of the non-dependent new-expr we synthesize B's copy ctor, which we expect to get defined as deleted since A's copy ctor is inaccessible. But during access checking thereof, enforce_access incorrectly decides to defer it since we're in a template context according to current_template_parms (before r14-557 it checked processing_template_decl which got cleared from implicitly_declare_fn), which leads to the access check leaking out to the template context that triggered the synthesization, and B's copy ctor getting declared as non-deleted. This patch fixes this by using maybe_push_to_top_level to clear the context (including current_template_parms) before proceeding with the synthesization. We could do this from implicitly_declare_fn, but it's better to do it more generally from synthesized_method_walk for sake of its other callers. This turns out to fix PR113332 as well: there the lambda context triggering synthesization was causing maybe_dummy_object to misbehave, but now synthesization is sufficiently context-independent. PR c++/113908 PR c++/113332 gcc/cp/ChangeLog: * method.cc (synthesized_method_walk): Use maybe_push_to_top_level. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/lambda/lambda-nsdmi11.C: New test. * g++.dg/template/non-dependent31.C: New test. Reviewed-by: Jason Merrill <ja...@redhat.com>
