<p dir="auto">by <strong>juanval</strong>:</p>
<pre class="notranslate">go version go1.3 darwin/amd64

What steps reproduce the problem?
Example: <a href="http://play.golang.org/p/-GqZSloAM3" rel="nofollow">http://play.golang.org/p/-GqZSloAM3</a>

    1. fmt.Println(math.Sin(1.5e17))

What happened?

    Program prints "1.231298118089368e+08"

What should have happened instead?

    Program should print value in [-1,1] range

Please provide any additional information below.

    Source code for math.Sin warns that "Results may be meaningless for x &gt; 2**49 = 5.6e14". However, it says nothing about not respecting the [-1,1] range. 

    I discovered this when doing math.Sin(float64(time.Now().UnixNano())) returned 1.1828933275348654e+20

    Also, that information does not appear in godoc.</pre>
<pre class="notranslate">Sigh, for example,

=== RUN TestConnectionlessWriteClosedError
--- PASS: TestConnectionlessWriteClosedError (0.00 seconds)
    write_test.go:134: use of closed network connection
    write_test.go:134: use of closed network connection
    write_test.go:134: use of closed network connection
    write_test.go:134: use of closed network connection
    write_test.go:134: use of closed network connection
    write_test.go:134: use of closed network connection

instead of

=== RUN TestConnectionlessWriteClosedError
--- PASS: TestConnectionlessWriteClosedError (0.00 seconds)
    write_test.go:134: udp4 127.0.0.1:41400: use of closed network connection
    write_test.go:134: udp4 127.0.0.1:41400: use of closed network connection
    write_test.go:134: udp6 [::1]:57416: use of closed network connection
    write_test.go:134: udp6 [::1]:57416: use of closed network connection
    write_test.go:134: unixgram /tmp/nettest869396226: use of closed network connection
    write_test.go:134: unixgram /tmp/nettest869396226: use of closed network connection

The root cause is <a href="https://golang.org/issue/4856" rel="nofollow">issue #4856</a>.</pre>