by morphius.faydal:

What steps will reproduce the problem?
1. repo version 3975:b51fd2d6c160
2. ./all.bash
3. will give an error.

What is the expected output? What do you see instead?
make[2]: Entering directory `/home/morphius/go/src/pkg/net'
rm -f _test/net.a _gotest_.8
make[2]: Leaving directory `/home/morphius/go/src/pkg/net'
make[2]: Entering directory `/home/morphius/go/src/pkg/net'
8g -o _gotest_.8 dnsclient.go dnsconfig.go dnsmsg.go fd.go fd_linux.go
ip.go ipsock.go net.go parse.go port.go sock.go tcpsock.go udpsock.go
unixsock.go    dialgoogle_test.go ip_test.go net_test.go parse_test.go
port_test.go server_test.go timeout_test.go
rm -f _test/net.a
gopack grc _test/net.a _gotest_.8 
make[2]: Leaving directory `/home/morphius/go/src/pkg/net'
SIGTRAP: trace trap
Faulting address: 0x0
PC=0x8052840

net·hostPortToIP+0x15d /home/morphius/go/src/pkg/net/ipsock.go:199
    net·hostPortToIP(0x809608c, 0x3, 0x80a9104, 0xf, 0x0, ...)
net·ResolveTCPAddr+0x36 /home/morphius/go/src/pkg/net/tcpsock.go:61
    net·ResolveTCPAddr(0x80a9104, 0xf, 0x80960d0, 0x0)
net·Dial+0x27e /home/morphius/go/src/pkg/net/net.go:133
    net·Dial(0x809608c, 0x3, 0x80960d0, 0x0, 0x80a9104, ...)
net·TestDialError+0xd8 /home/morphius/go/src/pkg/net/net_test.go:56
    net·TestDialError(0x400ba130, 0x1)
testing·tRunner+0x36 /home/morphius/go/src/pkg/testing/testing.go:105
    testing·tRunner(0x400ba130, 0x80c9a54, 0x0)
goexit /home/morphius/go/src/pkg/runtime/proc.c:134
    goexit()
0x400ba130 unknown pc

goroutine 3:
runtime·entersyscall+0x60 /home/morphius/go/src/pkg/runtime/proc.c:539
    runtime·entersyscall()
syscall·Syscall6+0x5 /home/morphius/go/src/pkg/syscall/asm_linux_386.s:650
    syscall·Syscall6()
syscall·EpollWait+0x7c
/home/morphius/go/src/pkg/syscall/zsyscall_linux_386.go:132
    syscall·EpollWait(0x6, 0x400bac30, 0x1, 0x1, 0x165, ...)
net·*pollster·WaitFD+0xff /home/morphius/go/src/pkg/net/fd_linux.go:116
    net·*pollster·WaitFD(0x400424f0, 0x1540ac80, 0x0, 0x400b41c0, 0x72, ...)
net·*pollServer·Run+0xc3 /home/morphius/go/src/pkg/net/fd.go:237
    net·*pollServer·Run(0x4008e2a0, 0x80cb318)
goexit /home/morphius/go/src/pkg/runtime/proc.c:134
    goexit()
0x4008e2a0 unknown pc

goroutine 1:
gosched+0x48 /home/morphius/go/src/pkg/runtime/proc.c:515
    gosched()
chanrecv+0x2d3 /home/morphius/go/src/pkg/runtime/chan.c:319
    chanrecv(0x400ce810, 0x4007af8c, 0x0, 0x4007c0d8)
runtime·chanrecv1+0x4e /home/morphius/go/src/pkg/runtime/chan.c:415
    runtime·chanrecv1(0x400ce810, 0x80c9a54)
testing·Main+0x25f /home/morphius/go/src/pkg/testing/testing.go:132
    testing·Main(0x80c9a3c, 0xb)
main·main+0x29 /home/morphius/go/src/pkg/net/_testmain.go:21
    main·main()
mainstart+0xf /home/morphius/go/src/pkg/runtime/386/asm.s:81
    mainstart()
goexit /home/morphius/go/src/pkg/runtime/proc.c:134
    goexit()
eax     0x4004805000000000
ebx     0x400480504007bf10
ecx     0x40048050080a9104
edx     0x4004805040079820
edi     0x400480504007bf10
esi     0x400480504007bee8
ebp     0x4004805000000001
esp     0x400480504007bec4
eip     0x4004805008052840
eflags  0x4004805000200246
cs      0x4004805000000073
fs      0x4004805000000000
gs      0x400480500000003f
/home/morphius/gobin/gotest: line 141: 25464 Trace/breakpoint trap   $E
./$O.out "$@"
make[1]: *** [test] Error 133
make[1]: Leaving directory `/home/morphius/go/src/pkg/net'
make: *** [net.test] Error 2
morphius@azmael:~/go/src$

What is your $GOOS?  $GOARCH?

$GOOS=linux
$GOARCH=386

Which revision are you sync'ed to?  (hg log -l 1)

3975:b51fd2d6c160


Please provide any additional information below.