Point to iterable for incompatible type in intersection

Author: Girgias

Zend/tests/type_declarations/intersection_types/invalid_types/invalid_iterable_type.phpt

@@ -7,4 +7,4 @@ function foo(): iterable&Iterator {}
 
 ?>
 --EXPECTF--
-Fatal error: Type Traversable|array cannot be part of an intersection type in %s on line %d
+Fatal error: Type iterable cannot be part of an intersection type in %s on line %d

Zend/zend_compile.c

@@ -6276,7 +6276,11 @@ static zend_type zend_compile_typename(
 			zend_type single_type = zend_compile_single_typename(type_ast);
 
 			/* An intersection of standard types cannot exist so invalidate it */
-			if (ZEND_TYPE_PURE_MASK(single_type)) {
+			/* Check for iterable early */
+			if (ZEND_TYPE_IS_ITERABLE_FALLBACK(single_type)) {
+				zend_error_noreturn(E_COMPILE_ERROR, "Type iterable cannot be part of an intersection type");
+			}
+			if (ZEND_TYPE_IS_ONLY_MASK(single_type)) {
 				zend_string *standard_type_str = zend_type_to_string(single_type);
 				zend_error_noreturn(E_COMPILE_ERROR,
 					"Type %s cannot be part of an intersection type", ZSTR_VAL(standard_type_str));