runtime: marked free object in span 0x7fd320efec30, elemsize=16 freeindex=0 (bad use of unsafe.Pointer? try -d=checkptr)

fatal error: found pointer to free object

goroutine 3 [running]:
runtime.throw(0x11cf3f5, 0x1c)
/usr/local/go1.16.3/src/runtime/panic.go:1117 +0x72 fp=0xc0000615e0 sp=0xc0000615b0 pc=0x439ef2
runtime.(*mspan).reportZombies(0x7fd320efec30)
/usr/local/go1.16.3/src/runtime/mgcsweep.go:614 +0x376 fp=0xc000061660 sp=0xc0000615e0 pc=0x428036
runtime.(*mspan).sweep(0x7fd320efec30, 0x7fd320efec00, 0x468200)
/usr/local/go1.16.3/src/runtime/mgcsweep.go:447 +0x473 fp=0xc000061740 sp=0xc000061660 pc=0x427493
runtime.sweepone(0x1214670)
/usr/local/go1.16.3/src/runtime/mgcsweep.go:229 +0x28d fp=0xc0000617a8 sp=0xc000061740 pc=0x426ded
runtime.bgsweep(0xc000088000)
/usr/local/go1.16.3/src/runtime/mgcsweep.go:166 +0xbe fp=0xc0000617d8 sp=0xc0000617a8 pc=0x426a9e
runtime.goexit()
/usr/local/go1.16.3/src/runtime/asm_amd64.s:1371 +0x1 fp=0xc0000617e0 sp=0xc0000617d8 pc=0x474041
created by runtime.gcenable
/usr/local/go1.16.3/src/runtime/mgc.go:217 +0x5c

没定位到问题，尝试这找unsafe.Pointer 和CGO 也没定位到问题。

求解
--
FROM 111.204.182.*