fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x4 pc=0x278c851] runtime stack: runtime.throw({0x528ba3?, 0x0?}) GOROOT/src/runtime/panic.go:1047 +0x5d fp=0x7f35cffff050 sp=0x7f35cffff020 pc=0x124d2bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278c851 stack: frame={sp:0x7f35cffff050, fp:0x7f35cffff0b0} stack=[0x7f35cf7ff5c0,0x7f35cffff1c0) 0x00007f35cfffef50: 0x000000000000000e 0x000000000000001f 0x00007f35cfffef60: 0x000000000278c851 0x0000000000000004 0x00007f35cfffef70: 0x0000000000000001 0x000000000124d2bd 0x00007f35cfffef80: 0x00007f35cffff020 0x0000000000510ce3 0x00007f35cfffef90: 0x00007f35cfffefd0 0x000000000124d688 0x00007f35cfffefa0: 0x000000c0097901a0 0x000000000074db40 0x00007f35cfffefb0: 0x0000000000000001 0x00007f35cffff020 0x00007f35cfffefc0: 0x000000000124d2bd 0x000000c0097901a0 0x00007f35cfffefd0: 0x00007f35cffff010 0x000000000124d60c 0x00007f35cfffefe0: 0x00007f35cfffeff0 0x000000c0097901a0 0x00007f35cfffeff0: 0x000000000124d640 0x000000c0097901a0 0x00007f35cffff000: 0x000000000124d2bd 0x00007f35cffff020 0x00007f35cffff010: 0x00007f35cffff040 0x000000000124d2bd 0x00007f35cffff020: 0x00007f35cffff028 0x000000000124d2e0 0x00007f35cffff030: 0x0000000000528ba3 0x000000000000002a 0x00007f35cffff040: 0x00007f35cffff0a0 0x0000000001265dc9 0x00007f35cffff050: <0x0000000000528ba3 0x0000000000000000 0x00007f35cffff060: 0x000000c000000001 0x000000c0097901a0 0x00007f35cffff070: 0x0000000002ed1820 0x0000000002ed6820 0x00007f35cffff080: 0x000000c0097901a0 0x00000000027942d4 0x00007f35cffff090: 0x0000000002ed1820 0x0000000000000200 0x00007f35cffff0a0: 0x00007f35cffff128 !0x000000000278c851 0x00007f35cffff0b0: >0x0000000002edf080 0x0000000002794a41 0x00007f35cffff0c0: 0x00000000028c445c 0x0000000000000001 0x00007f35cffff0d0: 0x00007f35cffff128 0x00007f35cffff100 0x00007f35cffff0e0: 0x000000c009782000 0x000000c0097901a0 0x00007f35cffff0f0: 0x000000c009782000 0x000000000128767a 0x00007f35cffff100: 0x0000000001287a6c 0x000000000128969b 0x00007f35cffff110: 0x00000000028c4478 0x00007f3600000001 0x00007f35cffff120: 0x0000000000000001 0x00007f35cffff168 0x00007f35cffff130: 0x0000000001400ba9 0x0000000001287a6c 0x00007f35cffff140: 0x000000c000768670 0x00007f36cf603900 0x00007f35cffff150: 0x00007f36ced1d768 0x000000c0000061a0 0x00007f35cffff160: 0x000000c0008e40c8 0x00007f35cffff198 0x00007f35cffff170: 0x0000000001256ae3 0x000000c0000061a0 0x00007f35cffff180: 0x0000000400000002 0x000000c009782000 0x00007f35cffff190: 0x000000c0000061a0 0x000000c0007686b0 0x00007f35cffff1a0: 0x0000000001283bc3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f35cffff0b0 sp=0x7f35cffff050 pc=0x1265dc9