================
@@ -13649,10 +13649,29 @@
TreeTransform<Derived>::TransformLambdaExpr(LambdaExpr *E) {
// use evaluation contexts to distinguish the function parameter case.
CXXRecordDecl::LambdaDependencyKind DependencyKind =
CXXRecordDecl::LDK_Unknown;
+ DeclContext *DC = getSema().CurContext;
+ // A RequiresExprBodyDecl is not interesting for dependencies.
+ // For the following case,
+ //
+ // template <typename>
+ // concept C = requires { [] {}; };
+ //
+ // template <class F>
+ // struct Widget;
+ //
+ // template <C F>
+ // struct Widget<F> {};
+ //
+ // While we are here in substitution for Widget<F>, the parent of DC would be
+ // the template specialization itself. Thus, the lambda expression
+ // will be deemed as dependent even if we have non-dependent template
+ // arguments.
----------------
cor3ntin wrote:
```suggestion
// will be deemed as dependent even if there is are no dependent template
// arguments.
```
https://github.com/llvm/llvm-project/pull/83997
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