by ndecker.de:

This is not good if the pattern is user supplied.

What steps will reproduce the problem?
func TestMatch(t *testing.T) {
    _, _ = filepath.Match("[", "a")
}

What is the expected output?
error: ErrBadPattern

What do you see instead?
=== RUN TestMatch
--- FAIL: TestMatch (0.00 seconds)
panic: runtime error: index out of range [recovered]
    panic: runtime error: index out of range

goroutine 7 [running]:
testing.func·004()
    /usr/local/go/src/pkg/testing/testing.go:348 +0x105
path/filepath.matchChunk(0x811c6e9, 0x1, 0x811c8f9, 0x0, 0x0, ...)
    /usr/local/go/src/pkg/path/filepath/match.go:136 +0x315
path/filepath.Match(0x811c6e9, 0x0, 0x811c8f8, 0x1, 0x18365008, ...)
    /usr/local/go/src/pkg/path/filepath/match.go:55 +0xe6


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

Which operating system are you using?
linux/i386

Which version are you using?  (run 'go version')
go version go1.1 linux/386