net: error on connectionless-mode write doesn't contain address information

[mikioh]

For example, 

--- PASS: TestConnectionlessWriteTooLongError (0.00 seconds)
    write_test.go:89: 65536 bytes write udp4: message too long
    write_test.go:110: 65536 bytes write udp4: message too long
    write_test.go:89: 65536 bytes write udp6: message too long
    write_test.go:110: 65536 bytes write udp6: message too long
    write_test.go:89: 1048576 bytes write unixgram: message too long
    write_test.go:110: 1048576 bytes write unixgram: message too long

instead of

--- PASS: TestConnectionlessWriteTooLongError (0.00 seconds)
    write_test.go:89: 65536 bytes write udp4 127.0.0.1:33494: message too long
    write_test.go:110: 65536 bytes write udp4 127.0.0.1:33494: message too long
    write_test.go:89: 65536 bytes write udp6 [::1]:42353: message too long
    write_test.go:110: 65536 bytes write udp6 [::1]:42353: message too long
    write_test.go:89: 1048576 bytes write unixgram /tmp/nettest925274809:: message too long
    write_test.go:110: 1048576 bytes write unixgram /tmp/nettest925274809:: message too long

The root cause is issue #4856.

[mikioh]

Comment 1:

Status changed to Started.

[mikioh]

Comment 2:

Status changed to New.

[gopherbot]

Comment 3:

CL https://golang.org/cl/84750043 references this issue.

[gopherbot]

Comment 4:

CL https://golang.org/cl/85630044 mentions this issue.

[mikioh]

Comment 5:

Labels changed: added release-go1.4, removed release-go1.3maybe.

[rsc]

Comment 6:

Status changed to Duplicate.

Merged into issue #4856.