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=0x7f4f30ff9050 sp=0x7f4f30ff9020 pc=0x124d2bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278c851 stack: frame={sp:0x7f4f30ff9050, fp:0x7f4f30ff90b0} stack=[0x7f4f307f95c0,0x7f4f30ff91c0) 0x00007f4f30ff8f50: 0x000000000000000e 0x000000000000001f 0x00007f4f30ff8f60: 0x000000000278c851 0x0000000000000004 0x00007f4f30ff8f70: 0x0000000000000001 0x000000000124d2bd 0x00007f4f30ff8f80: 0x00007f4f30ff9020 0x0000000000510ce3 0x00007f4f30ff8f90: 0x00007f4f30ff8fd0 0x000000000124d688 0x00007f4f30ff8fa0: 0x000000c0007fa340 0x000000000074db40 0x00007f4f30ff8fb0: 0x0000000000000001 0x00007f4f30ff9020 0x00007f4f30ff8fc0: 0x000000000124d2bd 0x000000c0007fa340 0x00007f4f30ff8fd0: 0x00007f4f30ff9010 0x000000000124d60c 0x00007f4f30ff8fe0: 0x00007f4f30ff8ff0 0x000000c0007fa340 0x00007f4f30ff8ff0: 0x000000000124d640 0x000000c0007fa340 0x00007f4f30ff9000: 0x000000000124d2bd 0x00007f4f30ff9020 0x00007f4f30ff9010: 0x00007f4f30ff9040 0x000000000124d2bd 0x00007f4f30ff9020: 0x00007f4f30ff9028 0x000000000124d2e0 0x00007f4f30ff9030: 0x0000000000528ba3 0x000000000000002a 0x00007f4f30ff9040: 0x00007f4f30ff90a0 0x0000000001265dc9 0x00007f4f30ff9050: <0x0000000000528ba3 0x0000000000000000 0x00007f4f30ff9060: 0x000000c000000001 0x000000c0007fa340 0x00007f4f30ff9070: 0x0000000002ed1820 0x0000000002ed6820 0x00007f4f30ff9080: 0x000000c0007fa340 0x00000000027942d4 0x00007f4f30ff9090: 0x0000000002ed1820 0x0000000000000200 0x00007f4f30ff90a0: 0x00007f4f30ff9128 !0x000000000278c851 0x00007f4f30ff90b0: >0x0000000002edf080 0x0000000002794a41 0x00007f4f30ff90c0: 0x00000000028c445c 0x0000000000000001 0x00007f4f30ff90d0: 0x00007f4f30ff9128 0x00007f4f30ff9100 0x00007f4f30ff90e0: 0x000000c000a22c00 0x000000c0007fa340 0x00007f4f30ff90f0: 0x0001000000000000 0x000000000128767a 0x00007f4f30ff9100: 0x0000000001287a6c 0x000000000128969b 0x00007f4f30ff9110: 0x00000000028c4478 0x00007f4f00000001 0x00007f4f30ff9120: 0x0000000000000001 0x00007f4f30ff9168 0x00007f4f30ff9130: 0x0000000001400ba9 0x0000000001287a6c 0x00007f4f30ff9140: 0x000000c0005ee670 0x00007f4fded03900 0x00007f4f30ff9150: 0x00007f4f9f7b75f8 0x000000c0000061a0 0x00007f4f30ff9160: 0x000000c0008be908 0x00007f4f30ff9198 0x00007f4f30ff9170: 0x0000000001256ae3 0x000000c0000061a0 0x00007f4f30ff9180: 0x0000000400000002 0x000000c000a22c00 0x00007f4f30ff9190: 0x000000c0000061a0 0x000000c0005ee6b0 0x00007f4f30ff91a0: 0x0000000001283bc3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f4f30ff90b0 sp=0x7f4f30ff9050 pc=0x1265dc9