ctrl-d on ipfs block stat causes a panic

[daviddias]

Version/Platform/Processor information (from ipfs version --all):

» ipfs version --all
go-ipfs version: 0.4.3-dev-d742fb1
Repo version: 4
System version: amd64/darwin
Golang version: go1.6.2

Type (bug, feature, meta, test failure, question): bug
Area (api, commands, daemon, fuse, etc): cli
Priority (from P0: functioning, to P4: operations on fire): P1

Description:

» ipfs block stat
ipfs: Reading from /dev/stdin; send Ctrl-d to stop.
panic: runtime error: index out of range

goroutine 1 [running]:
panic(0xa7b560, 0xc82000e090)
        /usr/local/go/src/runtime/panic.go:481 +0x3e6
github.com/ipfs/go-ipfs/core/commands.glob.func12(0x2149848, 0xc82015e600, 0x2149ae0, 0xc82025d810)
        /Users/david/code/go-projects/src/github.com/ipfs/go-ipfs/core/commands/block.go:61 +0x224
github.com/ipfs/go-ipfs/commands.(*Command).Call(0x125ffe0, 0x2149848, 0xc82015e600, 0x0, 0x0)
        /Users/david/code/go-projects/src/github.com/ipfs/go-ipfs/commands/command.go:111 +0x472
main.callCommand(0x2149a50, 0xc82032a0c0, 0x2149848, 0xc82015e600, 0x125ffe0, 0x123d7c0, 0x0, 0x0, 0x0, 0x0)
        /Users/david/code/go-projects/src/github.com/ipfs/go-ipfs/cmd/ipfs/main.go:346 +0xa84
main.(*cmdInvocation).Run(0xc82032a000, 0x2149a50, 0xc82032a0c0, 0x0, 0x0, 0x0, 0x0)
        /Users/david/code/go-projects/src/github.com/ipfs/go-ipfs/cmd/ipfs/main.go:189 +0x1e7
main.main()
        /Users/david/code/go-projects/src/github.com/ipfs/go-ipfs/cmd/ipfs/main.go:154 +0x660

[daviddias]

Thank you @whyrusleeping ❤️