ecb4882e36
Here during declaration matching for the two constrained template friends, we crash from maybe_substitute_reqs_for because the second friend doesn't yet have DECL_TEMPLATE_INFO set (we're being called indirectly from push_template_decl). As far as I can tell, this situation happens only when declaring a constrained template friend within a non-template class (as in the testcase), in which case the substitution would be a no-op anyway. So this patch rearranges maybe_substitute_reqs_for to gracefully handle missing DECL_TEMPLATE_INFO by just skipping the substitution. PR c++/105064 gcc/cp/ChangeLog: * constraint.cc (maybe_substitute_reqs_for): Don't assume DECL_TEMPLATE_INFO is available. gcc/testsuite/ChangeLog: * g++.dg/cpp2a/concepts-friend9.C: New test. |
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