llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Timm Baeder (tbaederr)

<details>
<summary>Changes</summary>

This would otherwise later assert in vsitZeroRecordInitializer().

---
Full diff: https://github.com/llvm/llvm-project/pull/179645.diff


2 Files Affected:

- (modified) clang/lib/AST/ByteCode/Compiler.cpp (+2) 
- (modified) clang/test/AST/ByteCode/invalid.cpp (+8) 


``````````diff
diff --git a/clang/lib/AST/ByteCode/Compiler.cpp 
b/clang/lib/AST/ByteCode/Compiler.cpp
index af076f90733df..13bd853b022a3 100644
--- a/clang/lib/AST/ByteCode/Compiler.cpp
+++ b/clang/lib/AST/ByteCode/Compiler.cpp
@@ -4501,6 +4501,8 @@ bool 
Compiler<Emitter>::visitZeroArrayInitializer(QualType T, const Expr *E) {
   }
   if (ElemType->isRecordType()) {
     const Record *R = getRecord(ElemType);
+    if (!R)
+      return false;
 
     for (size_t I = 0; I != NumElems; ++I) {
       if (!this->emitConstUint32(I, E))
diff --git a/clang/test/AST/ByteCode/invalid.cpp 
b/clang/test/AST/ByteCode/invalid.cpp
index 5f287c77e5418..c8298fa2c2b9b 100644
--- a/clang/test/AST/ByteCode/invalid.cpp
+++ b/clang/test/AST/ByteCode/invalid.cpp
@@ -143,3 +143,11 @@ namespace BitCastWithErrors {
   template<class T> int f(); // both-note {{candidate template ignored}}
   static union { char *x = f(); }; // both-error {{no matching function for 
call to 'f'}}
 }
+
+namespace NullRecord {
+  struct S1; // both-note {{forward declaration}}
+  struct S2 {
+    S1 s[2]; // both-error {{field has incomplete type 'S1'}}
+  };
+  S2 s = S2();
+}

``````````

</details>


https://github.com/llvm/llvm-project/pull/179645
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