From 9512f65759259cb3767f7c783266de941ef321f6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20D=C3=BCsterhus?= <tim@bastelstu.be>
Date: Fri, 7 Aug 2026 14:22:23 +0200
Subject: [PATCH] standard: Fix error reporting for negative timeouts in
 `Io\Poll\Context::wait()`

---
 ext/standard/io_poll.c                     |  2 +-
 ext/standard/tests/poll/poll_ctx_wait.phpt | 24 ++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 ext/standard/tests/poll/poll_ctx_wait.phpt

diff --git a/ext/standard/io_poll.c b/ext/standard/io_poll.c
index c29ccfee04f2..f57813874d52 100644
--- a/ext/standard/io_poll.c
+++ b/ext/standard/io_poll.c
@@ -791,7 +791,7 @@ PHP_METHOD(Io_Poll_Context, wait)
 	struct timespec timeout_ts;
 	if (timeout) {
 		if (timeout->duration.negative) {
-			zend_argument_value_error(2, "must not be negative");
+			zend_argument_value_error(1, "must not be negative");
 			RETURN_THROWS();
 		}
 
diff --git a/ext/standard/tests/poll/poll_ctx_wait.phpt b/ext/standard/tests/poll/poll_ctx_wait.phpt
new file mode 100644
index 000000000000..5080c1421fdb
--- /dev/null
+++ b/ext/standard/tests/poll/poll_ctx_wait.phpt
@@ -0,0 +1,24 @@
+--TEST--
+Io\Poll\Context::wait(): Parameter validation
+--FILE--
+<?php
+require_once __DIR__ . '/poll.inc';
+
+$poll_ctx = new Io\Poll\Context();
+
+try {
+    $poll_ctx->wait(timeout: Time\Duration::fromSeconds(1)->negate());
+} catch (Throwable $e) {
+    echo $e::class, ': ', $e->getMessage(), PHP_EOL;
+}
+
+try {
+    $poll_ctx->wait(maxEvents: -1);
+} catch (Throwable $e) {
+    echo $e::class, ': ', $e->getMessage(), PHP_EOL;
+}
+
+?>
+--EXPECT--
+ValueError: Io\Poll\Context::wait(): Argument #1 ($timeout) must not be negative
+ValueError: Io\Poll\Context::wait(): Argument #2 ($maxEvents) must be greater than 0