fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x4 pc=0x278cdd1] runtime stack: runtime.throw({0x528c5b?, 0x0?}) GOROOT/src/runtime/panic.go:1047 +0x5d fp=0x7f4a7a332050 sp=0x7f4a7a332020 pc=0x124d4bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278cdd1 stack: frame={sp:0x7f4a7a332050, fp:0x7f4a7a3320b0} stack=[0x7f4a79b325c0,0x7f4a7a3321c0) 0x00007f4a7a331f50: 0x000000000000000e 0x000000000000001f 0x00007f4a7a331f60: 0x000000000278cdd1 0x0000000000000004 0x00007f4a7a331f70: 0x0000000000000001 0x000000000124d4bd 0x00007f4a7a331f80: 0x00007f4a7a332020 0x0000000000510d9b 0x00007f4a7a331f90: 0x00007f4a7a331fd0 0x000000000124d888 0x00007f4a7a331fa0: 0x000000c005b821a0 0x000000000074dc00 0x00007f4a7a331fb0: 0x0000000000000001 0x00007f4a7a332020 0x00007f4a7a331fc0: 0x000000000124d4bd 0x000000c005b821a0 0x00007f4a7a331fd0: 0x00007f4a7a332010 0x000000000124d80c 0x00007f4a7a331fe0: 0x00007f4a7a331ff0 0x000000c005b821a0 0x00007f4a7a331ff0: 0x000000000124d840 0x000000c005b821a0 0x00007f4a7a332000: 0x000000000124d4bd 0x00007f4a7a332020 0x00007f4a7a332010: 0x00007f4a7a332040 0x000000000124d4bd 0x00007f4a7a332020: 0x00007f4a7a332028 0x000000000124d4e0 0x00007f4a7a332030: 0x0000000000528c5b 0x000000000000002a 0x00007f4a7a332040: 0x00007f4a7a3320a0 0x0000000001265fc9 0x00007f4a7a332050: <0x0000000000528c5b 0x0000000000000000 0x00007f4a7a332060: 0x00007f4a7a332090 0x00007f4a7a332090 0x00007f4a7a332070: 0x00000000028d0900 0x000000000118e078 0x00007f4a7a332080: 0x000000c005b821a0 0x0000000000000000 0x00007f4a7a332090: 0x00000000028d0900 0x00000000028d0900 0x00007f4a7a3320a0: 0x00007f4a7a332128 !0x000000000278cdd1 0x00007f4a7a3320b0: >0x0000000000000003 0x00000583a5193091 0x00007f4a7a3320c0: 0x00000000028c49dc 0x0000000000000001 0x00007f4a7a3320d0: 0x00007f4a7a332128 0x00007f4a7a332100 0x00007f4a7a3320e0: 0x000000c005b80000 0x000000c005b821a0 0x00007f4a7a3320f0: 0x000000c005b80000 0x000000000128787a 0x00007f4a7a332100: 0x0000000001287c6c 0x000000000128989b 0x00007f4a7a332110: 0x00000000028c49f8 0x00007f4a00000001 0x00007f4a7a332120: 0x0000000000000001 0x00007f4a7a332168 0x00007f4a7a332130: 0x0000000001400da9 0x0000000001287c6c 0x00007f4a7a332140: 0x000000c000c0c670 0x00007f4b83e03900 0x00007f4a7a332150: 0x00007f4b587b9858 0x000000c0000061a0 0x00007f4a7a332160: 0x000000c0007fc908 0x00007f4a7a332198 0x00007f4a7a332170: 0x0000000001256ce3 0x000000c0000061a0 0x00007f4a7a332180: 0x0000000400000002 0x000000c005b80000 0x00007f4a7a332190: 0x000000c0000061a0 0x000000c000c0c6b0 0x00007f4a7a3321a0: 0x0000000001283dc3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f4a7a3320b0 sp=0x7f4a7a332050 pc=0x1265fc9