net: Dial connects successfully to unreachable host

[brennerm]

What does 'go version' print?

go version go1.4.2 darwin/amd64

What steps reproduce the problem?
http://play.golang.org/p/3Xm-GLcohL

What happened?
returned error is nil when dial any non-existent address.

What should have happened instead?
the error should not be nil.

Please provide any additional information below.

• exact same issue which is already closed
• running on MacOSX 10.10.2

[ianlancetaylor]

I can not recreate the problem on GNU/Linux with either tip or Go 1.4.

Can anybody else recreate it on OS X?

[mrekucci]

Also, I can not reproduce the problem on my Mac OS X 10.10.2.

[brennerm]

Any further information needed from my side?

[mikioh]

exact same issue which is already closed

Not true.

conn, err := net.Dial("ip4:1", UNREACHABLE_HOST)

Please revisit what you are trying to do for which protocol and its transport characteristic.

[mikioh]

PS: If you need a bit handy ICMP stuff, see http://godoc.org/golang.org/x/net/icmp.
PPS: ICMP is pretty raw stuff, specifying destination address on transmission/source address on reception by connect syscall via Dial API is insufficient to control message exchange.
PPPS: #8276 is epoll, mostly Linux-specific issue. It never happens on platforms using another mech. such as kqueue, IOCP and event port.

[brennerm]

Ok thanks for your support, guys.