fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x4 pc=0x278bb11] runtime stack: runtime.throw({0x528c68?, 0x0?}) GOROOT/src/runtime/panic.go:1047 +0x5d fp=0x7f78073ff050 sp=0x7f78073ff020 pc=0x124d0bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278bb11 stack: frame={sp:0x7f78073ff050, fp:0x7f78073ff0b0} stack=[0x7f7806bff5c0,0x7f78073ff1c0) 0x00007f78073fef50: 0x000000000000000e 0x000000000000001f 0x00007f78073fef60: 0x000000000278bb11 0x0000000000000004 0x00007f78073fef70: 0x0000000000000001 0x000000000124d0bd 0x00007f78073fef80: 0x00007f78073ff020 0x0000000000510da8 0x00007f78073fef90: 0x00007f78073fefd0 0x000000000124d488 0x00007f78073fefa0: 0x000000c0008904e0 0x000000000074d908 0x00007f78073fefb0: 0x0000000000000001 0x00007f78073ff020 0x00007f78073fefc0: 0x000000000124d0bd 0x000000c0008904e0 0x00007f78073fefd0: 0x00007f78073ff010 0x000000000124d40c 0x00007f78073fefe0: 0x00007f78073feff0 0x000000c0008904e0 0x00007f78073feff0: 0x000000000124d440 0x000000c0008904e0 0x00007f78073ff000: 0x000000000124d0bd 0x00007f78073ff020 0x00007f78073ff010: 0x00007f78073ff040 0x000000000124d0bd 0x00007f78073ff020: 0x00007f78073ff028 0x000000000124d0e0 0x00007f78073ff030: 0x0000000000528c68 0x000000000000002a 0x00007f78073ff040: 0x00007f78073ff0a0 0x0000000001265bc9 0x00007f78073ff050: <0x0000000000528c68 0x0000000000000000 0x00007f78073ff060: 0x000000c000000001 0x000000c0008904e0 0x00007f78073ff070: 0x0000000002ed0a20 0x0000000002ed5a20 0x00007f78073ff080: 0x000000c0008904e0 0x0000000002793594 0x00007f78073ff090: 0x0000000002ed0a20 0x0000000000000200 0x00007f78073ff0a0: 0x00007f78073ff128 !0x000000000278bb11 0x00007f78073ff0b0: >0x0000000002ede280 0x0000000002793d01 0x00007f78073ff0c0: 0x00000000028c389c 0x0000000000000001 0x00007f78073ff0d0: 0x00007f78073ff128 0x00007f78073ff100 0x00007f78073ff0e0: 0x000000c00087c000 0x000000c0008904e0 0x00007f78073ff0f0: 0x0000000000000004 0x000000000128747a 0x00007f78073ff100: 0x000000000128786c 0x000000000128949b 0x00007f78073ff110: 0x00000000028c38b8 0x00007f7700000001 0x00007f78073ff120: 0x0000000000000001 0x00007f78073ff168 0x00007f78073ff130: 0x00000000014009a9 0x000000000128786c 0x00007f78073ff140: 0x000000c000ce6670 0x00007f78aca03900 0x00007f78073ff150: 0x00007f788034df48 0x000000c0000061a0 0x00007f78073ff160: 0x000000c000572548 0x00007f78073ff198 0x00007f78073ff170: 0x00000000012568e3 0x000000c0000061a0 0x00007f78073ff180: 0x0000000400000002 0x000000c00087c000 0x00007f78073ff190: 0x000000c0000061a0 0x000000c000ce66b0 0x00007f78073ff1a0: 0x00000000012839c3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f78073ff0b0 sp=0x7f78073ff050 pc=0x1265bc9