Revert "Inheritance checks should not ignore parents if these implement an interface"

This reverts commit b67eb34.

Author: krakjoe

NEWS

@@ -15,8 +15,6 @@ PHP                                                                        NEWS
   . Fixed bug #73969 (segfault in debug_print_backtrace). (andrewnester)
   . Fixed bug #73994 (arginfo incorrect for unpack). (krakjoe)
   . Fixed bug #73973 (assertion error in debug_zval_dump). (andrewnester)
-  . Fixed bug #73987 (Method compatibility check looks to original 
-    definition and not parent). (pmmaga)
 
 - DOM:
   . Fixed bug #54382 (getAttributeNodeNS doesn't get xmlns* attributes).

Zend/tests/bug62358.phpt

@@ -23,4 +23,4 @@ class B extends A {
 }
 ?>
 --EXPECTF--
-Fatal error: Declaration of B::foo($var) must be compatible with A::foo() in %sbug62358.php on line 17
+Fatal error: Declaration of B::foo($var) must be compatible with I::foo() in %sbug62358.php on line 17

Zend/tests/bug73987.phpt

@@ -607,12 +607,13 @@ static void do_inheritance_check_on_method(zend_function *child, zend_function *
 	} else if (!(parent->common.fn_flags & ZEND_ACC_CTOR) || (parent->common.prototype && (parent->common.prototype->common.scope->ce_flags & ZEND_ACC_INTERFACE))) {
 		/* ctors only have a prototype if it comes from an interface */
 		child->common.prototype = parent->common.prototype ? parent->common.prototype : parent;
-		/* and if that is the case, we want to check inheritance against it */
-		if (parent->common.fn_flags & ZEND_ACC_CTOR) {
-			parent = child->common.prototype;
-		}
 	}
 
+	if (child->common.prototype && (
+		child->common.prototype->common.fn_flags & ZEND_ACC_ABSTRACT
+	)) {
+		parent = child->common.prototype;
+	}
 	if (UNEXPECTED(!zend_do_perform_implementation_check(child, parent))) {
 		int error_level;
 		const char *error_verb;