71141b1bd5
In the below testcase, we're ICEing from alias_ctad_tweaks ultimately because the implied deduction guide for X's user-defined constructor already has constraints associated with it. We then carry over these constraints to 'fprime', the overlying deduction guide for the alias template Y, via tsubst_decl from alias_ctad_tweaks. Later in alias_ctad_tweaks we call get_constraints followed by set_constraints without doing remove_constraints in between, which triggers the !found assert in set_constraints. This patch fixes this issue by adding an intervening call to remove_constraints. gcc/cp/ChangeLog: PR c++/95486 * pt.c (alias_ctad_tweaks): Call remove_constraints before calling set_constraints. gcc/testsuite/ChangeLog: PR c++/95486 * g++.dg/cpp2a/class-deduction-alias3.C: New test. |
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