5421fae8b1
This ICE-on-invalid goes back to GCC 6. In finish_template_variable, if coerce_innermost_template_parms returns error_mark_node, we pass it down to constraints_satisfied_p and that error_mark_node flows down to various satisfy_* functions and then to various tsubst_* functions, where we crash. diagnose_constraints also doesn't cope with error arglist, so I think we should just return as in the patch below. gcc/cp/ChangeLog: PR c++/95735 * pt.c (finish_template_variable): Return if coerce_innermost_template_parms return error_mark_node. gcc/testsuite/ChangeLog: PR c++/95735 * g++.dg/cpp2a/concepts-err2.C: New test. |
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