https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93812
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Martin Sebor <mse...@gcc.gnu.org>: https://gcc.gnu.org/g:a499c2f899961f2c09db2dc33e60b66e8d770092 commit r10-6960-ga499c2f899961f2c09db2dc33e60b66e8d770092 Author: Martin Sebor <mse...@redhat.com> Date: Sun Mar 1 17:41:45 2020 -0700 PR c/93812 - ICE on redeclaration of an attribute format function without protoype gcc/c/ChangeLog: PR c/93812 * c-typeck.c (build_functype_attribute_variant): New function. (composite_type): Call it. gcc/testsuite/ChangeLog: PR c/93812 * gcc.dg/format/proto.c: New test.