[clang] [clang][ExprConst] Check record base classes for valid structs (PR #132270)

[Erich Keane via cfe-commits]

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@@ -7385,8 +7385,13 @@ class APValueToBufferConverter {
       for (size_t I = 0, E = CXXRD->getNumBases(); I != E; ++I) {
         const CXXBaseSpecifier &BS = CXXRD->bases_begin()[I];
         CXXRecordDecl *BaseDecl = BS.getType()->getAsCXXRecordDecl();
+        const APValue &Base = Val.getStructBase(I);
 
-        if (!visitRecord(Val.getStructBase(I), BS.getType(),
+        // Can happen in error cases.
+        if (!Base.isStruct())
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erichkeane wrote:

Curious what `Base` ends up being here?  Are we putting a NULL in here or 
something?

https://github.com/llvm/llvm-project/pull/132270
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