https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109357
--- Comment #4 from CVS Commits ---
The releases/gcc-12 branch has been updated by Jason Merrill
:
https://gcc.gnu.org/g:618b90f5688fa7c0923a3e07a0741c6ede0e6e4e
commit r12-9445-g618b90f5688fa7c0923a3e07a0741c6ede0e6e4e
Author: Jason Merrill
Date: Fri Apr 14 22:40:43 2023 -0400
c++: constexpr aggregate destruction [PR109357]
We were assuming that the result of evaluation of TARGET_EXPR_INITIAL would
always be the new value of the temporary, but that's not necessarily true
when the initializer is complex (i.e. target_expr_needs_replace). In that
case evaluating the initializer initializes the temporary as a side-effect.
PR c++/109357
gcc/cp/ChangeLog:
* constexpr.cc (cxx_eval_constant_expression) [TARGET_EXPR]:
Check for complex initializer.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/constexpr-dtor15.C: New test.
