[clang] [Clang] Fix the lambda context for constraint evaluation (PR #184319)

[Corentin Jabot via cfe-commits]

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@@ -477,6 +477,8 @@ class ConstraintSatisfactionChecker {
   ConstraintSatisfaction &Satisfaction;
   bool BuildExpression;
 
+  const ConceptReference *ParentConcept = nullptr;
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cor3ntin wrote:

Can you add a comment here?

https://github.com/llvm/llvm-project/pull/184319