fatal error: MSpanList_Insert on HighSierra about git-annex-remote-b2 HOT 3 OPEN

fatal error: MSpanList_Insert

runtime stack:
runtime.throw(0x435190, 0x10)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/panic.go:530 +0x90 fp=0x7ffeefbff2f0 sp=0x7ffeefbff2d8
runtime.(*mSpanList).insert(0x5df9a8, 0x667000)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:933 +0x293 fp=0x7ffeefbff320 sp=0x7ffeefbff2f0
runtime.(*mheap).freeSpanLocked(0x5df1a0, 0x667000, 0x100, 0x0)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:809 +0x4be fp=0x7ffeefbff388 sp=0x7ffeefbff320
runtime.(*mheap).grow(0x5df1a0, 0x8, 0x0)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:675 +0x2a0 fp=0x7ffeefbff3e0 sp=0x7ffeefbff388
runtime.(*mheap).allocSpanLocked(0x5df1a0, 0x1, 0x0)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:553 +0x4e3 fp=0x7ffeefbff438 sp=0x7ffeefbff3e0
runtime.(*mheap).alloc_m(0x5df1a0, 0x1, 0x15, 0x0)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:437 +0x119 fp=0x7ffeefbff468 sp=0x7ffeefbff438
runtime.(*mheap).alloc.func1()
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:502 +0x41 fp=0x7ffeefbff498 sp=0x7ffeefbff468
runtime.systemstack(0x7ffeefbff4b8)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/asm_amd64.s:307 +0xab fp=0x7ffeefbff4a0 sp=0x7ffeefbff498
runtime.(*mheap).alloc(0x5df1a0, 0x1, 0x10000000015, 0x1223f)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mheap.go:503 +0x63 fp=0x7ffeefbff4e8 sp=0x7ffeefbff4a0
runtime.(*mcentral).grow(0x5e0da0, 0x0)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mcentral.go:209 +0x93 fp=0x7ffeefbff550 sp=0x7ffeefbff4e8
runtime.(*mcentral).cacheSpan(0x5e0da0, 0x5d9ab8)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mcentral.go:89 +0x47d fp=0x7ffeefbff590 sp=0x7ffeefbff550
runtime.(*mcache).refill(0x663000, 0x15, 0x7ffeefbff5f8)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/mcache.go:119 +0xcc fp=0x7ffeefbff5c8 sp=0x7ffeefbff590
runtime.mallocgc.func2()
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/malloc.go:642 +0x2b fp=0x7ffeefbff5e8 sp=0x7ffeefbff5c8
runtime.systemstack(0x7ffeefbff688)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/asm_amd64.s:307 +0xab fp=0x7ffeefbff5f0 sp=0x7ffeefbff5e8
runtime.mallocgc(0x180, 0x3efa20, 0x0, 0x800000000)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/malloc.go:643 +0x869 fp=0x7ffeefbff6c8 sp=0x7ffeefbff5f0
runtime.newobject(0x3efa20, 0x5d9f70)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/malloc.go:781 +0x42 fp=0x7ffeefbff6f0 sp=0x7ffeefbff6c8
runtime.malg(0x8000, 0x5da480)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/proc.go:2634 +0x27 fp=0x7ffeefbff728 sp=0x7ffeefbff6f0
runtime.mpreinit(0x5daa20)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/os1_darwin.go:140 +0x1f fp=0x7ffeefbff740 sp=0x7ffeefbff728
runtime.mcommoninit(0x5daa20)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/proc.go:494 +0x105 fp=0x7ffeefbff788 sp=0x7ffeefbff740
runtime.schedinit()
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/proc.go:434 +0x79 fp=0x7ffeefbff7d0 sp=0x7ffeefbff788
runtime.rt0_go(0x7ffeefbff800, 0x1, 0x7ffeefbff800, 0x0, 0x1, 0x7ffeefbff9a8, 0x0, 0x7ffeefbff9d3, 0x7ffeefbff9e3, 0x7ffeefbff9f0, ...)
	/home/ckastorff/.gimme/versions/go1.6.linux.amd64/src/runtime/asm_amd64.s:138 +0x132 fp=0x7ffeefbff7d8 sp=0x7ffeefbff7d0
(external special remote protocol error, unexpectedly received "" (unable to parse command)) failed
git-annex: copy: 1 failed