Backport fix for PR c++/93753 from trunk. gcc/cp/ChangeLog: Backport from trunk. 2020-02-21 Martin Sebor <msebor@redhat.com> PR c++/93753 * class.c (check_flexarrays): Tighten up a test for potential members of anonymous structs or unions. gcc/testsuite/ChangeLog: Backport from trunk. 2020-02-21 Martin Sebor <msebor@redhat.com> PR c++/93753 * g++.dg/ext/flexary36.C: New test.