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=0x7f727eb89050 sp=0x7f727eb89020 pc=0x124d0bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278bb11 stack: frame={sp:0x7f727eb89050, fp:0x7f727eb890b0} stack=[0x7f727e3895c0,0x7f727eb891c0) 0x00007f727eb88f50: 0x000000000000000e 0x000000000000001f 0x00007f727eb88f60: 0x000000000278bb11 0x0000000000000004 0x00007f727eb88f70: 0x0000000000000001 0x000000000124d0bd 0x00007f727eb88f80: 0x00007f727eb89020 0x0000000000510da8 0x00007f727eb88f90: 0x00007f727eb88fd0 0x000000000124d488 0x00007f727eb88fa0: 0x000000c000006ea0 0x000000000074d908 0x00007f727eb88fb0: 0x0000000000000001 0x00007f727eb89020 0x00007f727eb88fc0: 0x000000000124d0bd 0x000000c000006ea0 0x00007f727eb88fd0: 0x00007f727eb89010 0x000000000124d40c 0x00007f727eb88fe0: 0x00007f727eb88ff0 0x000000c000006ea0 0x00007f727eb88ff0: 0x000000000124d440 0x000000c000006ea0 0x00007f727eb89000: 0x000000000124d0bd 0x00007f727eb89020 0x00007f727eb89010: 0x00007f727eb89040 0x000000000124d0bd 0x00007f727eb89020: 0x00007f727eb89028 0x000000000124d0e0 0x00007f727eb89030: 0x0000000000528c68 0x000000000000002a 0x00007f727eb89040: 0x00007f727eb890a0 0x0000000001265bc9 0x00007f727eb89050: <0x0000000000528c68 0x0000000000000000 0x00007f727eb89060: 0x000000c000000001 0x000000c000006ea0 0x00007f727eb89070: 0x0000000002ed0a20 0x0000000002ed5a20 0x00007f727eb89080: 0x000000c000006ea0 0x0000000002793594 0x00007f727eb89090: 0x0000000002ed0a20 0x0000000000000200 0x00007f727eb890a0: 0x00007f727eb89128 !0x000000000278bb11 0x00007f727eb890b0: >0x0000000002ede280 0x0000000002793d01 0x00007f727eb890c0: 0x00000000028c389c 0x0000000000000001 0x00007f727eb890d0: 0x00007f727eb89128 0x00007f727eb89100 0x00007f727eb890e0: 0x000000c000138800 0x000000c000006ea0 0x00007f727eb890f0: 0x0004000000000000 0x000000000128747a 0x00007f727eb89100: 0x000000000128786c 0x000000000128949b 0x00007f727eb89110: 0x00000000028c38b8 0x00007f7100000001 0x00007f727eb89120: 0x0000000000000001 0x00007f727eb89168 0x00007f727eb89130: 0x00000000014009a9 0x000000000128786c 0x00007f727eb89140: 0x000000c0006c0670 0x00007f72a7803900 0x00007f727eb89150: 0x00007f72a6f16860 0x000000c0000061a0 0x00007f727eb89160: 0x000000c00090e728 0x00007f727eb89198 0x00007f727eb89170: 0x00000000012568e3 0x000000c0000061a0 0x00007f727eb89180: 0x0000000400000002 0x000000c000138800 0x00007f727eb89190: 0x000000c0000061a0 0x000000c0006c06b0 0x00007f727eb891a0: 0x00000000012839c3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7f727eb890b0 sp=0x7f727eb89050 pc=0x1265bc9