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=0x7fe0af3fd050 sp=0x7fe0af3fd020 pc=0x124d0bd runtime: g 0: unexpected return pc for runtime.sigpanic called from 0x278baf1 stack: frame={sp:0x7fe0af3fd050, fp:0x7fe0af3fd0b0} stack=[0x7fe0aebfd5c0,0x7fe0af3fd1c0) 0x00007fe0af3fcf50: 0x000000000000000e 0x000000000000001f 0x00007fe0af3fcf60: 0x000000000278baf1 0x0000000000000004 0x00007fe0af3fcf70: 0x0000000000000001 0x000000000124d0bd 0x00007fe0af3fcf80: 0x00007fe0af3fd020 0x0000000000510da8 0x00007fe0af3fcf90: 0x00007fe0af3fcfd0 0x000000000124d488 0x00007fe0af3fcfa0: 0x000000c0007c61a0 0x000000000074d908 0x00007fe0af3fcfb0: 0x0000000000000001 0x00007fe0af3fd020 0x00007fe0af3fcfc0: 0x000000000124d0bd 0x000000c0007c61a0 0x00007fe0af3fcfd0: 0x00007fe0af3fd010 0x000000000124d40c 0x00007fe0af3fcfe0: 0x00007fe0af3fcff0 0x000000c0007c61a0 0x00007fe0af3fcff0: 0x000000000124d440 0x000000c0007c61a0 0x00007fe0af3fd000: 0x000000000124d0bd 0x00007fe0af3fd020 0x00007fe0af3fd010: 0x00007fe0af3fd040 0x000000000124d0bd 0x00007fe0af3fd020: 0x00007fe0af3fd028 0x000000000124d0e0 0x00007fe0af3fd030: 0x0000000000528c68 0x000000000000002a 0x00007fe0af3fd040: 0x00007fe0af3fd0a0 0x0000000001265bc9 0x00007fe0af3fd050: <0x0000000000528c68 0x0000000000000000 0x00007fe0af3fd060: 0x4000000000000000 0x000000000277dfb6 0x00007fe0af3fd070: 0x0000000002ed0a20 0x0000000002ed5a20 0x00007fe0af3fd080: 0x000000c0007c61a0 0x0000000002793574 0x00007fe0af3fd090: 0x0000000002ed0a20 0x0000000000000200 0x00007fe0af3fd0a0: 0x00007fe0af3fd128 !0x000000000278baf1 0x00007fe0af3fd0b0: >0x0000000002ede280 0x0000000002793ce1 0x00007fe0af3fd0c0: 0x00000000028c389c 0x0000000000000001 0x00007fe0af3fd0d0: 0x00007fe0af3fd128 0x00007fe0af3fd100 0x00007fe0af3fd0e0: 0x000000c0004a8c00 0x000000c0007c61a0 0x00007fe0af3fd0f0: 0x0000000000000001 0x000000000128747a 0x00007fe0af3fd100: 0x000000000128786c 0x000000000128949b 0x00007fe0af3fd110: 0x00000000028c38b8 0x00007fe000000001 0x00007fe0af3fd120: 0x0000000000000001 0x00007fe0af3fd168 0x00007fe0af3fd130: 0x00000000014009a9 0x000000000128786c 0x00007fe0af3fd140: 0x000000c000b2c670 0x00007fe15ec03900 0x00007fe0af3fd150: 0x00007fe1345bc538 0x000000c0000061a0 0x00007fe0af3fd160: 0x000000c0009367b8 0x00007fe0af3fd198 0x00007fe0af3fd170: 0x00000000012568e3 0x000000c0000061a0 0x00007fe0af3fd180: 0x0000000400000002 0x000000c0004a8c00 0x00007fe0af3fd190: 0x000000c0000061a0 0x000000c000b2c6b0 0x00007fe0af3fd1a0: 0x00000000012839c3 0x000000c0000061a0 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:821 +0x3e9 fp=0x7fe0af3fd0b0 sp=0x7fe0af3fd050 pc=0x1265bc9