From af99fcb280aad1ce9452a20b420890176bc65725 Mon Sep 17 00:00:00 2001
From: Kevin Krakauer <krakauer@google.com>
Date: Fri, 3 Feb 2023 11:10:48 -0800
Subject: [PATCH] eventfd: more detailed error message

PiperOrigin-RevId: 506948082
---
 pkg/eventfd/eventfd.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/eventfd/eventfd.go b/pkg/eventfd/eventfd.go
index 99ebad34d..3a5197ea4 100644
--- a/pkg/eventfd/eventfd.go
+++ b/pkg/eventfd/eventfd.go
@@ -78,8 +78,8 @@ func (ev Eventfd) Write(val uint64) error {
 		if err == unix.EINTR {
 			continue
 		}
-		if n != sizeofUint64 {
-			panic(fmt.Sprintf("short write to eventfd: got %d bytes, wanted %d", n, sizeofUint64))
+		if err != nil || n != sizeofUint64 {
+			panic(fmt.Sprintf("bad write to eventfd: got %d bytes, wanted %d with error %v", n, sizeofUint64, err))
 		}
 		return err
 	}