https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109586
--- Comment #2 from Gaius Mulley <gaius at gcc dot gnu.org> --- Created attachment 54902 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54902&action=edit Add missing constant type to m2tree_IsAConstant The function m2block_RememberConstant calls m2tree_IsAConstant. However IsAConstant does not recognise TREE_CODE(t) == CONSTRUCTOR as a constant. This proposed patch updates IsAConstant and in turn fixes the PR.