<pre class="notranslate">I've been running a tip compiled server in prod, and got this stack trace in my logs:

Apr 04 08:28:59 daaku.org rell[15819]: 2013/04/04 08:28:59 http: panic serving
127.0.0.1:39333: runtime error: invalid memory address or nil pointer dereference
Apr 04 08:28:59 daaku.org rell[15819]: goroutine 10833 [running]:
Apr 04 08:28:59 daaku.org rell[15819]: net/http.func·007()
Apr 04 08:28:59 daaku.org rell[15819]:
/home/naitik/usr/go-tip/src/pkg/net/http/server.go:1025 +0xac
Apr 04 08:28:59 daaku.org rell[15819]: github.com/daaku/go%2eh.Write(0xc200181f60,
0xc200bb3f00, 0xc200c07860, 0x1, 0x5, ...)
...

All the relevant code is on github starting from the command: github.com/daaku/rell.

I don't have a small repro case unfortunately. It is not a common occurrence.

uname: Linux daaku.org 3.7.5-x86_64-linode29 #1 SMP Thu Jan 31 14:42:22 EST 2013 x86_64
GNU/Linux
go version: devel +47053fd8f41e Tue Apr 02 20:58:25 2013 -0700 linux/amd64</pre>
<p dir="auto"><a href="https://storage.googleapis.com/go-build-log/2d6a1955/windows-amd64-gce_21f24cce.log" rel="nofollow">https://storage.googleapis.com/go-build-log/2d6a1955/windows-amd64-gce_21f24cce.log</a></p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="...
--- FAIL: TestDoDupSuppress (0.01s)
    singleflight_test.go:74: number of calls = 10; want over 0 and less than n
FAIL
FAIL    internal/singleflight   0.076s
..."><pre class="notranslate"><code class="notranslate">...
--- FAIL: TestDoDupSuppress (0.01s)
    singleflight_test.go:74: number of calls = 10; want over 0 and less than n
FAIL
FAIL    internal/singleflight   0.076s
...
</code></pre></div>