1--TEST--
2Prevent switching fibers when dispatching pending signals
3--EXTENSIONS--
4pcntl
5posix
6--FILE--
7<?php
8
9pcntl_signal(SIGUSR1, function (): void {
10    if (Fiber::getCurrent() !== null) {
11        Fiber::suspend();
12    }
13});
14
15$fiber = new Fiber(function (): void {
16    echo "Fiber start\n";
17
18    posix_kill(posix_getpid(), SIGUSR1);
19
20    try {
21        pcntl_signal_dispatch();
22    } catch (FiberError $e) {
23        Fiber::suspend($e);
24    }
25
26    echo "Fiber end\n";
27});
28
29$e = $fiber->start();
30
31echo $e, "\n";
32
33$fiber->resume();
34
35?>
36--EXPECTF--
37Fiber start
38FiberError: Cannot switch fibers in current execution context in %ssignal-dispatch.php:%d
39Stack trace:
40#0 %ssignal-dispatch.php(%d): Fiber::suspend()
41#1 [internal function]: {closure:%s:%d}(%d, Array)
42#2 %ssignal-dispatch.php(%d): pcntl_signal_dispatch()
43#3 [internal function]: {closure:%s:%d}()
44#4 %ssignal-dispatch.php(%d): Fiber->start()
45#5 {main}
46Fiber end
47