fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x4 pc=0x278baf1] runtime stack: runtime.throw({0x528c68?, 0x0?}) GOROOT/src/runtime/panic.go:1047 +0x5d fp=0x7f27677fe050 sp=0x7f27677fe020 pc=0x124d0bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278baf1 stack: frame={sp:0x7f27677fe050, fp:0x7f27677fe0b0} stack=[0x7f2766ffe5c0,0x7f27677fe1c0) 0x00007f27677fdf50: 0x000000000000000e 0x000000000000001f 0x00007f27677fdf60: 0x000000000278baf1 0x0000000000000004 0x00007f27677fdf70: 0x0000000000000001 0x000000000124d0bd 0x00007f27677fdf80: 0x00007f27677fe020 0x0000000000510da8 0x00007f27677fdf90: 0x00007f27677fdfd0 0x000000000124d488 0x00007f27677fdfa0: 0x000000c0064921a0 0x000000000074d908 0x00007f27677fdfb0: 0x0000000000000001 0x00007f27677fe020 0x00007f27677fdfc0: 0x000000000124d0bd 0x000000c0064921a0 0x00007f27677fdfd0: 0x00007f27677fe010 0x000000000124d40c 0x00007f27677fdfe0: 0x00007f27677fdff0 0x000000c0064921a0 0x00007f27677fdff0: 0x000000000124d440 0x000000c0064921a0 0x00007f27677fe000: 0x000000000124d0bd 0x00007f27677fe020 0x00007f27677fe010: 0x00007f27677fe040 0x000000000124d0bd 0x00007f27677fe020: 0x00007f27677fe028 0x000000000124d0e0 0x00007f27677fe030: 0x0000000000528c68 0x000000000000002a 0x00007f27677fe040: 0x00007f27677fe0a0 0x0000000001265bc9 0x00007f27677fe050: <0x0000000000528c68 0x0000000000000000 0x00007f27677fe060: 0x00007f27677fe090 0x00007f27677fe090 0x00007f27677fe070: 0x00000000028cf5c0 0x000000000118dc58 0x00007f27677fe080: 0x000000c0064921a0 0x0000000000000000 0x00007f27677fe090: 0x00000000028cf5c0 0x00000000028cf5c0 0x00007f27677fe0a0: 0x00007f27677fe128 !0x000000000278baf1 0x00007f27677fe0b0: >0x0000000000000003 0x00294a2481b40362 0x00007f27677fe0c0: 0x00000000028c389c 0x0000000000000001 0x00007f27677fe0d0: 0x00007f27677fe128 0x00007f27677fe100 0x00007f27677fe0e0: 0x000000c006490000 0x000000c0064921a0 0x00007f27677fe0f0: 0x0000000000000004 0x000000000128747a 0x00007f27677fe100: 0x000000000128786c 0x000000000128949b 0x00007f27677fe110: 0x00000000028c38b8 0x00007f2700000001 0x00007f27677fe120: 0x0000000000000001 0x00007f27677fe168 0x00007f27677fe130: 0x00000000014009a9 0x000000000128786c 0x00007f27677fe140: 0x000000c000672670 0x00007f286cb03900 0x00007f27677fe150: 0x00007f28404e25f0 0x000000c0000061a0 0x00007f27677fe160: 0x000000c0009a2ae8 0x00007f27677fe198 0x00007f27677fe170: 0x00000000012568e3 0x000000c0000061a0 0x00007f27677fe180: 0x0000000400000002 0x000000c006490000 0x00007f27677fe190: 0x000000c0000061a0 0x000000c0006726b0 0x00007f27677fe1a0: 0x00000000012839c3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f27677fe0b0 sp=0x7f27677fe050 pc=0x1265bc9