fatal error: stack overflow runtime stack: runtime.throw({0x123516d?, 0x2030040?}) GOROOT/src/runtime/panic.go:1077 +0x5c fp=0xc004509e18 sp=0xc004509de8 pc=0x43ab5c runtime.newstack() GOROOT/src/runtime/stack.go:1107 +0x5ac fp=0xc004509fc8 sp=0xc004509e18 pc=0x4554ac runtime.morestack() src/runtime/asm_amd64.s:593 +0x8f fp=0xc004509fd0 sp=0xc004509fc8 pc=0x46f52f