runtime: nelems=512 nalloc=339 previous allocCount=338 nfreed=65535
fatal error: sweep increased allocation count
runtime stack:
runtime.throw(0x106b506, 0x20)
/usr/local/go/src/runtime/panic.go:608 +0x72
runtime.(*mspan).sweep(0x7f06d49c7428, 0x433e00, 0xc000000d00)
/usr/local/go/src/runtime/mgcsweep.go:298 +0x879
runtime.sweepone(0x434617)
/usr/local/go/src/runtime/mgcsweep.go:113 +0x10f
runtime.gosweepone.func1()
/usr/local/go/src/runtime/mgcsweep.go:137 +0x2b
runtime.systemstack(0x0)
/usr/local/go/src/runtime/asm_amd64.s:351 +0x66
runtime.mstart()
/usr/local/go/src/runtime/proc.go:1229
excuse me, what is the cause of this error?