code.go

func (b *Board) run() {
	for {
		msg := message{}
		header, err := b.buf.ReadByte() // Line 123 in my full file.
		if err != nil {
			log.Printf("Error reading message header: %s", err)
			return
		}

		// Sysex commands have their own header so check for that first.
		switch {
		case header == startSysex:
			// Read until sysexEnd
			data, err := b.buf.ReadBytes(endSysex)
			if err != nil {
				log.Printf("Error reading sysex data: %s", err)
				return
			}
			msg.t = sysexMsg
			msg.data = append([]byte{header}, data...)
			b.handleCallback(msg)

		default:
			// Read the two MIDI data bytes
			lsb, err := b.buf.ReadByte()
			if err != nil {
				log.Printf("Error reading MIDI lsb: %s", err)
				return
			}
			msb, err := b.buf.ReadByte()
			if err != nil {
				log.Printf("Error reading MIDI msb: %s", err)
				return
			}
			msg.t = midiMsg
			msg.data = []byte{header, lsb, msb}
			b.handleCallback(msg)
		}
	}
}

error

➜  gizmo_led  ./gizmo_led
fatal error: out of memory (stackcacherefill)

goroutine 1 [running]:
[fp=0x7fcb654e1cc0] runtime.park(0x0, 0x0, 0x426d20)
        /usr/lib/go/src/pkg/runtime/proc.c:1175 +0x64

goroutine 2 [syscall]:

goroutine 4 [syscall]:
syscall.Syscall()
        /usr/lib/go/src/pkg/syscall/asm_linux_amd64.s:16 +0x5
syscall.read(0x3, 0xc200074000, 0x1000, 0x1000, 0x100000000000003, ...)
        /usr/lib/go/src/pkg/syscall/zerrors_linux_amd64.go:2337 +0x70
syscall.Read(0x3, 0xc200074000, 0x1000, 0x1000, 0x408c58, ...)
        /usr/lib/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc2000009b8, 0xc200074000, 0x1000, 0x1000, 0x412e54, ...)
        /usr/lib/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc2000009b8, 0xc200074000, 0x1000, 0x1000, 0x0, ...)
        /usr/lib/go/src/pkg/os/file.go:95 +0x96
bufio.(*Reader).fill(0xc2000730c0)
        /usr/lib/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).ReadByte(0xc2000730c0, 0x1b, 0x0, 0x0)
        /usr/lib/go/src/pkg/bufio/bufio.go:171 +0x7d
github.com/ZachMassia/GoGoGadget.(*Board).run(0xc200044140)
        /home/zach/dev/lang/go/src/github.com/ZachMassia/GoGoGadget/board.go:123 +0x57
created by github.com/ZachMassia/GoGoGadget.(*Board).init
        /home/zach/dev/lang/go/src/github.com/ZachMassia/GoGoGadget/board.go:101 +0x205
➜  gizmo_led  free -m
             total       used       free     shared    buffers     cached
Mem:          5884       1762       4122          0          7        480
-/+ buffers/cache:       1274       4609
Swap:            0          0          0