From 631c28c9e3814de45b1a55b0d475d41623981dae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Igor=20Anic=CC=81?= <igor.anic@gmail.com>
Date: Sun, 31 Mar 2024 23:51:40 +0200
Subject: [PATCH] io_uring: add failing test

For issue: #19451
---
 lib/std/os/linux/IoUring.zig | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/lib/std/os/linux/IoUring.zig b/lib/std/os/linux/IoUring.zig
index 0e3c4ce338..7c8eeae7b2 100644
--- a/lib/std/os/linux/IoUring.zig
+++ b/lib/std/os/linux/IoUring.zig
@@ -4230,3 +4230,25 @@ fn expect_buf_grp_cqe(
 
     return cqe;
 }
+
+test "failing test for issue 19451" {
+    var ring = try IoUring.init(2, 0);
+    defer ring.deinit();
+
+    try testing.expectEqual(2, ring.sq.sqes.len);
+    try testing.expectEqual(4, ring.cq.cqes.len);
+
+    for (0..4) |i| {
+        const sqe = try ring.get_sqe();
+        sqe.prep_timeout(&.{ .tv_sec = 0, .tv_nsec = 10000 }, 0, 0);
+        sqe.user_data = i;
+        _ = try ring.submit();
+    }
+
+    var cqe_count: u32 = 0;
+    while (cqe_count < 4) {
+        var cqes: [8]linux.io_uring_cqe = undefined;
+        cqe_count += try ring.copy_cqes(&cqes, 4 - cqe_count);
+    }
+    try testing.expectEqual(4, cqe_count);
+}