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

This reverts commit b67eb3440bb244adf6957bf2c68aeeaa6efc8c8d.

5 files changed, 6 insertions, 43 deletions

diff --git a/NEWS b/NEWS
index 36fcffc381..5a11736deb 100644
--- a/NEWS
+++ b/NEWS
@@ -11,8 +11,6 @@ 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).
diff --git a/Zend/tests/bug62358.phpt b/Zend/tests/bug62358.phpt
index 8509383d46..35bbc33835 100644
--- a/Zend/tests/bug62358.phpt
+++ b/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
diff --git a/Zend/tests/bug73987.phpt b/Zend/tests/bug73987.phpt
deleted file mode 100644
index 551565650c..0000000000
--- a/Zend/tests/bug73987.phpt
+++ /dev/null
@@ -1,18 +0,0 @@
---TEST--
-Bug #73987 (Method compatibility check looks to original definition and not parent)
---FILE--
-<?php
-
-interface I {
-  public function example($a, $b, $c);
-}
-class A implements I {
-  public function example($a, $b = null, $c = null) { } // compatible with I::example
-}
-class B extends A {
-  public function example($a, $b, $c = null) { } // compatible with I::example
-}
-
-?>
---EXPECTF--
-Fatal error: Declaration of B::example($a, $b, $c = NULL) must be compatible with A::example($a, $b = NULL, $c = NULL) in %s
diff --git a/Zend/tests/bug73987_1.phpt b/Zend/tests/bug73987_1.phpt
deleted file mode 100644
index 6a0a157f29..0000000000
--- a/Zend/tests/bug73987_1.phpt
+++ /dev/null
@@ -1,18 +0,0 @@
---TEST--
-Bug #73987 (Method compatibility check looks to original definition and not parent)
---FILE--
-<?php
-
-interface I {
-  public function example();
-}
-class A implements I {
-  public function example(): int { } // compatible with I::example
-}
-class B extends A {
-  public function example(): string { } // compatible with I::example
-}
-
-?>
---EXPECTF--
-Fatal error: Declaration of B::example(): string must be compatible with A::example(): int in %s
diff --git a/Zend/zend_inheritance.c b/Zend/zend_inheritance.c
index 8ad5cc2e01..fd1345f844 100644
--- a/Zend/zend_inheritance.c
+++ b/Zend/zend_inheritance.c
@@ -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;