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knock-out's Issues

複数回channelをcloseするとpanicした

exec.Command と time.Sleep が同時に終了するとchannelを2回closeしようとしてpanicした

~/go/knock_out ❯❯❯ go build && ./knock_out
finish sleep!!!
finish command!!!
panic: close of closed channel

goroutine 20 [running]:
main.main.func4(0xc00009a060)
        ~/go/knock_out/main.go:34 +0xeb
created by main.main
        ~/go/knock_out/main.go:31 +0x199

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