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The testcase is the work-around testcase for the PR; even that had started failing. The problem was that, when unqualifying the type of a TARGET_EXPR, we'd create a variant of the type, then request the conversion of the TARGET_EXPR_INITIAL to that variant type. Though the types are different pointer-wise, they're the same_type_p, so the resulting modified expr compares cp_tree_equal to the original, which maybe_constant_value flags as an error. There's no reason to construct an alternate TARGET_EXPR or CONSTRUCTOR just because of an equivalent type, except for another spot that expected pointer equality that would no longer be satisfied. Without relaxing the assert in constexpr_call_hasher::equal, g++.robertl/eb73.C would trigger an assertion failure. for gcc/cp/ChangeLog PR c++/85569 * constexpr.c (adjust_temp_type): Test for type equality with same_type_p. (constexpr_call_hasher::equal): Likewise. for gcc/testsuite/ChangeLog PR c++/85569 * g++.dg/cpp1z/pr85569.C: New. From-SVN: r266816
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