Use unmangled named in property type inheritance error

Author: nikic

Zend/tests/type_declarations/typed_properties_protected_inheritance_mismatch.phpt

@@ -0,0 +1,11 @@
+--TEST--
+Typed property invariance violation for protected properties
+--FILE--
+<?php
+
+class A { protected int $x; }
+class B extends A { protected $x; }
+
+?>
+--EXPECTF--
+Fatal error: Type of B::$x must be int (as in class A) in %s on line %d

Zend/zend_inheritance.c

@@ -936,7 +936,7 @@ static void emit_incompatible_property_error(
 	zend_error_noreturn(E_COMPILE_ERROR,
 		"Type of %s::$%s must be %s%s (as in class %s)",
 		ZSTR_VAL(child->ce->name),
-		ZSTR_VAL(child->name),
+		zend_get_unmangled_property_name(child->name),
 		ZEND_TYPE_ALLOW_NULL(parent->type) ? "?" : "",
 		ZEND_TYPE_IS_CLASS(parent->type)
 			? ZSTR_VAL(ZEND_TYPE_IS_CE(parent->type) ? ZEND_TYPE_CE(parent->type)->name : resolve_class_name(parent->ce, ZEND_TYPE_NAME(parent->type)))