Private method incorrectly marked as "overwrites" in reflection

Fix GH-9409
Closes GH-9469

NEWS

@@ -25,6 +25,8 @@ PHP                                                                        NEWS
 - Reflection:
   . Fixed bug GH-8932 (ReflectionFunction provides no way to get the called
     class of a Closure). (cmb, Nicolas Grekas)
+  . Fixed bug GH-9409 (Private method is incorrectly dumped as "overwrites").
+    (ilutov)
 
 - Streams:
   . Fixed bug GH-9316 ($http_response_header is wrong for long status line).

ext/reflection/php_reflection.c

@@ -784,7 +784,7 @@ static void _function_string(smart_str *str, zend_function *fptr, zend_class_ent
 		} else if (fptr->common.scope->parent) {
 			lc_name = zend_string_tolower(fptr->common.function_name);
 			if ((overwrites = zend_hash_find_ptr(&fptr->common.scope->parent->function_table, lc_name)) != NULL) {
-				if (fptr->common.scope != overwrites->common.scope) {
+				if (fptr->common.scope != overwrites->common.scope && !(overwrites->common.fn_flags & ZEND_ACC_PRIVATE)) {
 					smart_str_append_printf(str, ", overwrites %s", ZSTR_VAL(overwrites->common.scope->name));
 				}
 			}

ext/reflection/tests/ReflectionClass_toString_003.phpt

@@ -66,7 +66,7 @@ Class [ <user> class B extends A ] {
   }
 
   - Methods [1] {
-    Method [ <user, overwrites A> private method f ] {
+    Method [ <user> private method f ] {
       @@ %s 6 - 6
     }
   }
@@ -111,7 +111,7 @@ Class [ <user> class D extends C ] {
   }
 
   - Methods [1] {
-    Method [ <user, overwrites B> private method f ] {
+    Method [ <user> private method f ] {
       @@ %s 12 - 12
     }
   }

ext/reflection/tests/gh9409.phpt

@@ -0,0 +1,24 @@
+--TEST--
+GH-9409: Private method is incorrectly dumped as "overwrites"
+--FILE--
+<?php
+
+class A {
+    private function privateMethod() {}
+}
+
+class C extends A {
+    private function privateMethod() {}
+}
+
+echo (new ReflectionClass('A'))->getMethod('privateMethod');
+echo (new ReflectionClass('C'))->getMethod('privateMethod');
+
+?>
+--EXPECTF--
+Method [ <user> private method privateMethod ] {
+  @@ %s %d - %d
+}
+Method [ <user> private method privateMethod ] {
+  @@ %s %d - %d
+}