Fix bug #75290

NEWS

@@ -10,6 +10,8 @@ PHP                                                                        NEWS
     request). (Nikita)
   . Fixed bug #75220 (Segfault when calling is_callable on parent). 
     (andrewnester)
+  . Fixed bug #75290 (debug info of Closures of internal functions contain
+    garbage argument names). (Andrea)
 
 - litespeed:
   . Fixed bug #75248 (Binary directory doesn't get created when building 

Zend/tests/bug75290.phpt

@@ -0,0 +1,26 @@
+--TEST--
+Bug #75290 (debug info of Closures of internal functions contain garbage argument names)
+--FILE--
+<?php
+
+var_dump((new ReflectionFunction('sin'))->getClosure());
+
+var_dump(function ($someThing) {});
+
+?>
+--EXPECT--
+object(Closure)#2 (1) {
+  ["parameter"]=>
+  array(1) {
+    ["$number"]=>
+    string(10) "<required>"
+  }
+}
+object(Closure)#2 (1) {
+  ["parameter"]=>
+  array(1) {
+    ["$someThing"]=>
+    string(10) "<required>"
+  }
+}
+

Zend/zend_closures.c

@@ -414,6 +414,7 @@ static HashTable *zend_closure_get_debug_info(zval *object, int *is_temp) /* {{{
 	zval val;
 	struct _zend_arg_info *arg_info = closure->func.common.arg_info;
 	HashTable *debug_info;
+	zend_bool zstr_args = (closure->func.type == ZEND_USER_FUNCTION) || (closure->func.common.fn_flags & ZEND_ACC_USER_ARG_INFO);
 
 	*is_temp = 1;
 
@@ -446,9 +447,15 @@ static HashTable *zend_closure_get_debug_info(zval *object, int *is_temp) /* {{{
 			zend_string *name;
 			zval info;
 			if (arg_info->name) {
-				name = zend_strpprintf(0, "%s$%s",
-						arg_info->pass_by_reference ? "&" : "",
-						ZSTR_VAL(arg_info->name));
+				if (zstr_args) {
+					name = zend_strpprintf(0, "%s$%s",
+							arg_info->pass_by_reference ? "&" : "",
+							ZSTR_VAL(arg_info->name));
+				} else {
+					name = zend_strpprintf(0, "%s$%s",
+							arg_info->pass_by_reference ? "&" : "",
+							((zend_internal_arg_info*)arg_info)->name);
+				}
 			} else {
 				name = zend_strpprintf(0, "%s$param%d",
 						arg_info->pass_by_reference ? "&" : "",