[clang] [clang][AST] Assert that DependentNameType::Name is not null (PR #122418)

[Matheus Izvekov via cfe-commits]

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@@ -7035,17 +7035,16 @@ class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
       : TypeWithKeyword(Keyword, DependentName, CanonType,
                         TypeDependence::DependentInstantiation |
                             toTypeDependence(NNS->getDependence())),
-        NNS(NNS), Name(Name) {}
+        NNS(NNS), Name(Name) {
+    assert(Name);
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mizvekov wrote:

FWIW NNS must also be non-null, and additionally it must also be dependent.

https://github.com/llvm/llvm-project/pull/122418