Index: clang/lib/Sema/SemaChecking.cpp
===================================================================
--- clang/lib/Sema/SemaChecking.cpp
+++ clang/lib/Sema/SemaChecking.cpp
@@ -7981,6 +7981,14 @@
         DefaultFunctionArrayLvalueConversion(FirstArg);
     if (FirstArgResult.isInvalid())
       return true;
+    QualType firstArgType = FirstArgResult.get()->getType();
+
+    if (!firstArgType->isAnyPointerType()) {
+      QualType expectedType = Context.getPointerType(firstArgType);
+      return Diag(FirstArg->getBeginLoc(),
+                  diag::err_typecheck_convert_incompatible)
+             << firstArgType << expectedType << 1 << 0 << 0;
+    }
     TheCall->setArg(0, FirstArgResult.get());
   }