================
@@ -961,6 +961,7 @@ static const Expr
*SubstituteConstraintExpressionWithoutSatisfaction(
if (MLTAL.getNumSubstitutedLevels() == 0)
return ConstrExpr;
+ MLTAL.setKind(TemplateSubstitutionKind::Rewrite);
----------------
mizvekov wrote:
The new difference introduced in this patch is that a Rewrite is depth
preserving, while a specialization is not.
In this case, we want to rewrite a requires clause from another potential
redeclaration to see if it matches, and confirm it really is a redeclaration.
If we don't preserve the depth here, this would trip a new assert, where we
would be instantiating a requires clause at template depth 0, but then
parenting it to a declaration at depth 1, which is incorrect.
https://github.com/llvm/llvm-project/pull/107942
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