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=0x7f000edfd050 sp=0x7f000edfd020 pc=0x124d2bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278c851 stack: frame={sp:0x7f000edfd050, fp:0x7f000edfd0b0} stack=[0x7f000e5fd5c0,0x7f000edfd1c0) 0x00007f000edfcf50: 0x000000000000000e 0x000000000000001f 0x00007f000edfcf60: 0x000000000278c851 0x0000000000000004 0x00007f000edfcf70: 0x0000000000000001 0x000000000124d2bd 0x00007f000edfcf80: 0x00007f000edfd020 0x0000000000510ce3 0x00007f000edfcf90: 0x00007f000edfcfd0 0x000000000124d688 0x00007f000edfcfa0: 0x000000c000b3a4e0 0x000000000074db40 0x00007f000edfcfb0: 0x0000000000000001 0x00007f000edfd020 0x00007f000edfcfc0: 0x000000000124d2bd 0x000000c000b3a4e0 0x00007f000edfcfd0: 0x00007f000edfd010 0x000000000124d60c 0x00007f000edfcfe0: 0x00007f000edfcff0 0x000000c000b3a4e0 0x00007f000edfcff0: 0x000000000124d640 0x000000c000b3a4e0 0x00007f000edfd000: 0x000000000124d2bd 0x00007f000edfd020 0x00007f000edfd010: 0x00007f000edfd040 0x000000000124d2bd 0x00007f000edfd020: 0x00007f000edfd028 0x000000000124d2e0 0x00007f000edfd030: 0x0000000000528ba3 0x000000000000002a 0x00007f000edfd040: 0x00007f000edfd0a0 0x0000000001265dc9 0x00007f000edfd050: <0x0000000000528ba3 0x0000000000000000 0x00007f000edfd060: 0x000000c000000001 0x000000c000b3a4e0 0x00007f000edfd070: 0x00000000028d0380 0x000000000118de58 0x00007f000edfd080: 0x000000c000b3a4e0 0x0000000000000001 0x00007f000edfd090: 0x00007f00b0103900 0x0000000000000001 0x00007f000edfd0a0: 0x00007f000edfd128 !0x000000000278c851 0x00007f000edfd0b0: >0x4000000000000000 0x000000000277ed16 0x00007f000edfd0c0: 0x00000000028c445c 0x0000000000000001 0x00007f000edfd0d0: 0x00007f000edfd128 0x00007f000edfd100 0x00007f000edfd0e0: 0x000000c000887400 0x000000c000b3a4e0 0x00007f000edfd0f0: 0x0000000040000000 0x000000000128767a 0x00007f000edfd100: 0x0000000001287a6c 0x000000000128969b 0x00007f000edfd110: 0x00000000028c4478 0x00007f0000000001 0x00007f000edfd120: 0x0000000000000001 0x00007f000edfd168 0x00007f000edfd130: 0x0000000001400ba9 0x0000000001287a6c 0x00007f000edfd140: 0x000000c00054a670 0x00007f00b0103900 0x00007f000edfd150: 0x00007f008422c360 0x000000c0000061a0 0x00007f000edfd160: 0x000000c000043ef8 0x00007f000edfd198 0x00007f000edfd170: 0x0000000001256ae3 0x000000c0000061a0 0x00007f000edfd180: 0x0000000400000002 0x000000c000887400 0x00007f000edfd190: 0x000000c0000061a0 0x000000c00054a6b0 0x00007f000edfd1a0: 0x0000000001283bc3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f000edfd0b0 sp=0x7f000edfd050 pc=0x1265dc9