I get build fail:../../gcc_concepts/gcc/cp/call.c:8793:8: error: unused variable ‘m1’ [-Werror=unused-variable]
tree m1 = get_temploid (cand1); ^../../gcc_concepts/gcc/cp/call.c:8794:8: error: unused variable ‘m2’ [-Werror=unused-variable]
tree m2 = get_temploid (cand2); ^ cc1plus: all warnings being treated as errors
Commenting the lines let the build finish. Ed