Comment 1:

That's the first time that first byte ("H") was useful.  It suggests some HTTP response
is actually coming back.  I should make it read a bit more and log it in that case.
I'll try to reproduce with GOMAXPROCS=16 in a loop.

Owner changed to @bradfitz.

Status changed to Accepted.

Comment 2:

Labels changed: added priority-go1, removed priority-triage.

Comment 3:

I wouldn't be surprised if this bug was fixed by the same fix in
http://code.google.com/p/go/source/detail?r=f57165f82
I'm going to close this for now, but please re-open if you see this again!

Status changed to Duplicate.

Comment 4:

This is still happening with tip:
2012/02/01 04:02:15 Unsolicited response received on idle HTTP channel starting with
"H"; err=<nil>
throw: all goroutines are asleep - deadlock!
goroutine 1 [chan receive]:
testing.RunTests(0x400c00, 0x6e30e8, 0x300000003, 0x1, 0x6e06b0, ...)
go/workspace/src/pkg/testing/testing.go:330 +0x791
testing.Main(0x400c00, 0x6e30e8, 0x300000003, 0x6f41a0, 0x0, ...)
go/workspace/src/pkg/testing/testing.go:265 +0x62
main.main()
/tmp/go-build326991940/net/http/httputil/_test/_testmain.go:47 +0x91
goroutine 3 [chan receive]:
net/http.(*persistConn).roundTrip(0xf84005e120, 0xf8400178f0, 0x0, 0x0, 0x0, ...)
go/workspace/src/pkg/net/http/transport.go:641 +0x33a
net/http.(*Transport).RoundTrip(0xf84002af80, 0xf840019f00, 0xf84001b360, 0x0, 0x0, ...)
go/workspace/src/pkg/net/http/transport.go:158 +0x32f
net/http/httputil.DumpRequestOut(0xf840019f00, 0x427101, 0x0, 0x0, 0x0, ...)
go/workspace/src/pkg/net/http/httputil/dump.go:76 +0x1a1
net/http/httputil.TestDumpRequest(0xf840055000, 0x5ae9318)
go/workspace/src/pkg/net/http/httputil/dump_test.go:109 +0x356
testing.tRunner(0xf840055000, 0x6e3100, 0x0, 0x0)
go/workspace/src/pkg/testing/testing.go:254 +0x6f
created by testing.RunTests
go/workspace/src/pkg/testing/testing.go:329 +0x76e
FAIL    net/http/httputil   0.053s

Comment 5:

Okay, I can reproduce on Linux now.
bradfitz@gopher:~/go/src/pkg/net/http/httputil$ export GOMAXPROCS=16
bradfitz@gopher:~/go/src/pkg/net/http/httputil$ while go test -v; do echo pass; done
....
=== RUN TestDumpRequest-16
2012/02/01 10:13:33 Unsolicited response received on idle HTTP channel starting with
"H"; err=<nil>
throw: all goroutines are asleep - deadlock!
goroutine 1 [chan receive]:
testing.RunTests(0x400c00, 0x6e30e8, 0x300000003, 0x1, 0x6e06b0, ...)
    /usr/local/google/home/bradfitz/go/src/pkg/testing/testing.go:330 +0x791
testing.Main(0x400c00, 0x6e30e8, 0x300000003, 0x6f41a0, 0x0, ...)
    /usr/local/google/home/bradfitz/go/src/pkg/testing/testing.go:265 +0x62
main.main()
    /tmp/go-build710017555/net/http/httputil/_test/_testmain.go:47 +0x91
goroutine 3 [chan receive]:
net/http.(*persistConn).roundTrip(0xf84005d120, 0xf8400178f0, 0x0, 0x0, 0x0, ...)
    /usr/local/google/home/bradfitz/go/src/pkg/net/http/transport.go:641 +0x33a
net/http.(*Transport).RoundTrip(0xf840033340, 0xf840019f00, 0xf84001b360, 0x0, 0x0, ...)
    /usr/local/google/home/bradfitz/go/src/pkg/net/http/transport.go:158 +0x32f
net/http/httputil.DumpRequestOut(0xf840019f00, 0x427101, 0x0, 0x0, 0x0, ...)
    /usr/local/google/home/bradfitz/go/src/pkg/net/http/httputil/dump.go:76 +0x1a1
net/http/httputil.TestDumpRequest(0xf840000cb0, 0x13bbc5e8)
    /usr/local/google/home/bradfitz/go/src/pkg/net/http/httputil/dump_test.go:109 +0x356
testing.tRunner(0xf840000cb0, 0x6e3100, 0x0, 0x0)
    /usr/local/google/home/bradfitz/go/src/pkg/testing/testing.go:254 +0x6f
created by testing.RunTests
    /usr/local/google/home/bradfitz/go/src/pkg/testing/testing.go:329 +0x76e
exit status 2
FAIL    net/http/httputil   0.010s
I'll look into this.

Status changed to Accepted.

Comment 6:

Fix:
http://golang.org/cl/5614043

Status changed to Started.

Comment 7:

This issue was closed by revision b293533.

Status changed to Fixed.