fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd31ca0] runtime stack: runtime: unexpected return pc for runtime.sigpanic called from 0xd31ca0 stack: frame={sp:0x7ffc39d6a328, fp:0x7ffc39d6a378} stack=[0x7ffc3956b4b8,0x7ffc39d6a4e0) 00007ffc39d6a228: 00007ffc39d6a298 000000000043045a 00007ffc39d6a238: 0000000000430041 00007ffc39d6a308 00007ffc39d6a248: 0000000000000000 00000000015b8c40 00007ffc39d6a258: 01007ffc39d6a298 000000000000001f 00007ffc39d6a268: 000000c420062000 0000000000d31ca0 00007ffc39d6a278: 0000000000000000 0000000000000001 00007ffc39d6a288: 0000000000fda483 000000c420cd0180 00007ffc39d6a298: 00007ffc39d6a2c0 000000000045c1cc 00007ffc39d6a2a8: 00000000015b8c40 0000000000430041 00007ffc39d6a2b8: 00007ffc39d6a308 00007ffc39d6a2f8 00007ffc39d6a2c8: 000000000042ff6a 00007ffc39d6a2d8 00007ffc39d6a2d8: 000000000045c190 00000000015b8c40 00007ffc39d6a2e8: 0000000000430041 00007ffc39d6a308 00007ffc39d6a2f8: 00007ffc39d6a318 0000000000430041 00007ffc39d6a308: 0000000000000000 000000000000002a 00007ffc39d6a318: 00007ffc39d6a368 000000000044759e 00007ffc39d6a328: <0000000000fe154e 000000000000002a 00007ffc39d6a338: 00000000015b8c40 0000000000fee0f8 00007ffc39d6a348: 0000000000d7f051 00000000015b8c40 00007ffc39d6a358: 0000000000000000 00007f487c0e2908 00007ffc39d6a368: 00007f487c0e2908 !0000000000d31ca0 00007ffc39d6a378: >0000000000d41712 0000000000000000 00007ffc39d6a388: 0000000000000000 00007ffc39d6a3f0 00007ffc39d6a398: 00007ffc39d6a3b0 00000000015b9380 00007ffc39d6a3a8: 00000000004617b3 000000000043f1a3 00007ffc39d6a3b8: 0000000000d416d0 00007f487c0e2908 00007ffc39d6a3c8: 00007ffc39d6a3e0 0000000000726366 00007ffc39d6a3d8: 0000000000000000 0000000000000000 00007ffc39d6a3e8: 00007ffc39d6a3e0 00007ffc39d6a460 00007ffc39d6a3f8: 0000000000439113 0000000000726366 00007ffc39d6a408: 0000000100000006 0000000000460410 00007ffc39d6a418: 00007f4755438b60 0000000000003593 00007ffc39d6a428: 0000000800d42c36 000000c4206e27d8 00007ffc39d6a438: 0000000000000008 000000c4207b8000 00007ffc39d6a448: 000000c420062000 00000000015b8c40 00007ffc39d6a458: 000000c4207b8038 00007ffc39d6a490 00007ffc39d6a468: 000000000045cbc6 0000000000feb520 runtime.throw(0xfe154e, 0x2a) GOROOT/src/runtime/panic.go:616 +0x81 runtime: unexpected return pc for runtime.sigpanic called from 0xd31ca0 stack: frame={sp:0x7ffc39d6a328, fp:0x7ffc39d6a378} stack=[0x7ffc3956b4b8,0x7ffc39d6a4e0) 00007ffc39d6a228: 00007ffc39d6a298 000000000043045a 00007ffc39d6a238: 0000000000430041 00007ffc39d6a308 00007ffc39d6a248: 0000000000000000 00000000015b8c40 00007ffc39d6a258: 01007ffc39d6a298 000000000000001f 00007ffc39d6a268: 000000c420062000 0000000000d31ca0 00007ffc39d6a278: 0000000000000000 0000000000000001 00007ffc39d6a288: 0000000000fda483 000000c420cd0180 00007ffc39d6a298: 00007ffc39d6a2c0 000000000045c1cc 00007ffc39d6a2a8: 00000000015b8c40 0000000000430041 00007ffc39d6a2b8: 00007ffc39d6a308 00007ffc39d6a2f8 00007ffc39d6a2c8: 000000000042ff6a 00007ffc39d6a2d8 00007ffc39d6a2d8: 000000000045c190 00000000015b8c40 00007ffc39d6a2e8: 0000000000430041 00007ffc39d6a308 00007ffc39d6a2f8: 00007ffc39d6a318 0000000000430041 00007ffc39d6a308: 0000000000000000 000000000000002a 00007ffc39d6a318: 00007ffc39d6a368 000000000044759e 00007ffc39d6a328: <0000000000fe154e 000000000000002a 00007ffc39d6a338: 00000000015b8c40 0000000000fee0f8 00007ffc39d6a348: 0000000000d7f051 00000000015b8c40 00007ffc39d6a358: 0000000000000000 00007f487c0e2908 00007ffc39d6a368: 00007f487c0e2908 !0000000000d31ca0 00007ffc39d6a378: >0000000000d41712 0000000000000000 00007ffc39d6a388: 0000000000000000 00007ffc39d6a3f0 00007ffc39d6a398: 00007ffc39d6a3b0 00000000015b9380 00007ffc39d6a3a8: 00000000004617b3 000000000043f1a3 00007ffc39d6a3b8: 0000000000d416d0 00007f487c0e2908 00007ffc39d6a3c8: 00007ffc39d6a3e0 0000000000726366 00007ffc39d6a3d8: 0000000000000000 0000000000000000 00007ffc39d6a3e8: 00007ffc39d6a3e0 00007ffc39d6a460 00007ffc39d6a3f8: 0000000000439113 0000000000726366 00007ffc39d6a408: 0000000100000006 0000000000460410 00007ffc39d6a418: 00007f4755438b60 0000000000003593 00007ffc39d6a428: 0000000800d42c36 000000c4206e27d8 00007ffc39d6a438: 0000000000000008 000000c4207b8000 00007ffc39d6a448: 000000c420062000 00000000015b8c40 00007ffc39d6a458: 000000c4207b8038 00007ffc39d6a490 00007ffc39d6a468: 000000000045cbc6 0000000000feb520 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:372 +0x28e