https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91529
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:f76202e096fc0be4db21761399b55f10cd09b20d commit r9-8621-gf76202e096fc0be4db21761399b55f10cd09b20d Author: Jason Merrill <ja...@redhat.com> Date: Mon May 25 18:38:09 2020 -0400 c++: -fmerge-all-constants vs. destructors [PR91529] cp_finish_decl avoids setting TREE_READONLY on TREE_STATIC variables that have non-constant construction or destruction, but -fmerge-all-constants was converting an automatic variable to static while leaving TREE_READONLY set. Fixed by clearing the flag in cp_finish_decl in the presence of -fmerge-all-constants. gcc/cp/ChangeLog 2020-05-01 Jason Merrill <ja...@redhat.com> PR c++/91529 * decl.c (cp_finish_decl): Also clear TREE_READONLY if -fmerge-all-constants.