[pull] master from php:master

Zend/zend_string.h

@@ -751,6 +751,7 @@ default: ZEND_UNREACHABLE();
 	_(ZEND_STR_8_DOT_3,                "8.3") \
 	_(ZEND_STR_8_DOT_4,                "8.4") \
 	_(ZEND_STR_8_DOT_5,                "8.5") \
+	_(ZEND_STR_8_DOT_6,                "8.6") \
 
 
 typedef enum _zend_known_string_id {

build/gen_stub.php

@@ -2978,6 +2978,7 @@ class StringBuilder {
     private const PHP_86_KNOWN = [
         "arguments" => "ZEND_STR_ARGUMENTS",
         "NoDiscard" => "ZEND_STR_NODISCARD",
+        '8.6' => 'ZEND_STR_8_DOT_6',
     ];
 
     /**

ext/session/session.c

@@ -2484,6 +2484,9 @@ PHP_FUNCTION(session_create_id)
 		int limit = 3;
 		while (limit--) {
 			new_id = PS(mod)->s_create_sid(&PS(mod_data));
+			if (!new_id) {
+				break;
+			}
 			if (!PS(mod)->s_validate_sid || (PS(mod_user_implemented) && Z_ISUNDEF(PS(mod_user_names).ps_validate_sid))) {
 				break;
 			} else {
@@ -2505,6 +2508,9 @@ PHP_FUNCTION(session_create_id)
 		zend_string_release_ex(new_id, false);
 	} else {
 		smart_str_free(&id);
+		if (EG(exception)) {
+			RETURN_THROWS();
+		}
 		php_error_docref(NULL, E_WARNING, "Failed to create new ID");
 		RETURN_FALSE;
 	}

ext/session/tests/user_session_module/session_create_id_create_sid_throws.phpt

@@ -0,0 +1,49 @@
+--TEST--
+session_create_id() when the create_sid handler throws
+--INI--
+session.save_handler=files
+session.name=PHPSESSID
+session.gc_probability=0
+--EXTENSIONS--
+session
+--FILE--
+<?php
+
+ob_start();
+
+class MySessionHandler extends SessionHandler
+{
+    public int $calls = 0;
+
+    public function create_sid(): string
+    {
+        if ($this->calls++ > 0) {
+            throw new Exception('create_sid failed');
+        }
+        return parent::create_sid();
+    }
+
+    public function validateId(string $id): bool
+    {
+        return false;
+    }
+}
+
+session_set_save_handler(new MySessionHandler(), true);
+session_start();
+
+try {
+    session_create_id();
+} catch (Throwable $e) {
+    echo $e::class, ": ", $e->getMessage(), PHP_EOL;
+    $previous = $e->getPrevious();
+    echo $previous::class, ": ", $previous->getMessage(), PHP_EOL;
+}
+
+var_dump(session_status() === PHP_SESSION_ACTIVE);
+
+?>
+--EXPECT--
+Error: Session id must be a string
+Exception: create_sid failed
+bool(true)