Before filing a bug, please check whether it has been fixed since the
latest release. Search the issue tracker and check that you're running the
latest version of Go:

Run "go version" and compare against
http://golang.org/doc/devel/release.html  If a newer version of Go exists,
install it and retry what you did to reproduce the problem.

Thanks.

What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.

http://play.golang.org/p/J8sZQQHVAH

What is the expected output?
Valid error

What do you see instead?
panic: runtime error: index out of range

goroutine 1 [running]:
encoding/base64.(*Encoding).decode(0xf840000000, 0x4d2f60, 0x0, 0xf840037003, 0x0, ...)
    go/src/pkg/encoding/base64/base64.go:257 +0x20a
encoding/base64.(*Encoding).Decode(0xf840000000, 0x4d2f60, 0x0, 0xf840037000,
0x300000003, ...)
    go/src/pkg/encoding/base64/base64.go:272 +0x77
encoding/base64.(*Encoding).DecodeString(0xf840000000, 0x48523c, 0x3d515100000003,
0xf8400250d0, 0x4242a8, ...)
    go/src/pkg/encoding/base64/base64.go:279 +0xe0
main.main()
    /tmpfs/gosandbox-76892965_1d911c88_245c62e3_2b6ea28a_24c17932/prog.go:9 +0x41

Which compiler are you using (5g, 6g, 8g, gccgo)?


Which operating system are you using?


Which version are you using?  (run 'go version')


Please provide any additional information below.