https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89336
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> --- Author: jason Date: Tue Feb 19 01:01:50 2019 New Revision: 269003 URL: https://gcc.gnu.org/viewcvs?rev=269003&root=gcc&view=rev Log: PR c++/89336 - multiple stores in constexpr stmt. If we evaluate the RHS in the context of the LHS, that evaluation might change the LHS in ways that mess with being able to store the value later. So for assignment or scalar values, evaluate the RHS first. * constexpr.c (cxx_eval_store_expression): Preevaluate scalar or assigned value. Added: trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-89336-1.C trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-89336-2.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/constexpr.c
