diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 736f3e8bf2d16..2c219d6e8411e 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -4102,6 +4102,7 @@ LValue CodeGenFunction::EmitOMPArraySectionExpr(const OMPArraySectionExpr *E,
         }
       } else {
         auto *CAT = C.getAsConstantArrayType(ArrayTy);
+        assert(CAT && "unexpected type for array initializer");
         ConstLength = CAT->getSize();
       }
       if (Length) {