https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117775
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Simon Martin <simar...@gcc.gnu.org>: https://gcc.gnu.org/g:37f38b0f97374476a4818b68c8df991886428787 commit r15-6972-g37f38b0f97374476a4818b68c8df991886428787 Author: Simon Martin <si...@nasilyan.com> Date: Thu Jan 16 16:27:06 2025 +0100 c++: Make sure fold_sizeof_expr returns the correct type [PR117775] We currently ICE upon the following code, that is valid under -Wno-pointer-arith: === cut here === int main() { decltype( [](auto) { return sizeof(void); } ) x; return x.operator()(0); } === cut here === The problem is that "fold_sizeof_expr (sizeof(void))" returns size_one_node, that has a different TREE_TYPE from that of the sizeof expression, which later triggers an assert in cxx_eval_store_expression. This patch makes sure that fold_sizeof_expr always returns a tree with the size_type_node type. PR c++/117775 gcc/cp/ChangeLog: * decl.cc (fold_sizeof_expr): Make sure the folded result has type size_type_node. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/constexpr-117775.C: New test.
