fatal error: too many address space collisions for -race mode

runtime stack:
runtime.throw({0x52b496?, 0x0?})
	GOROOT/src/runtime/panic.go:1047 +0x5d fp=0x7f30066fa068 sp=0x7f30066fa038 pc=0x12f195d
runtime.(*mheap).sysAlloc(0x2871480, 0xc3ffffffff?, 0x2881618, 0x1)
	GOROOT/src/runtime/malloc.go:654 +0x645 fp=0x7f30066fa0f8 sp=0x7f30066fa068 pc=0x12c7485
runtime.(*mheap).grow(0x2871480, 0xc00001?)
	GOROOT/src/runtime/mheap.go:1472 +0x7f fp=0x7f30066fa170 sp=0x7f30066fa0f8 pc=0x12e29ff
runtime.(*mheap).allocSpan(0x2871480, 0xc00001, 0x0, 0xff?)
	GOROOT/src/runtime/mheap.go:1243 +0x1b7 fp=0x7f30066fa208 sp=0x7f30066fa170 pc=0x12e2317
runtime.(*mheap).alloc.func1()
	GOROOT/src/runtime/mheap.go:961 +0x65 fp=0x7f30066fa250 sp=0x7f30066fa208 pc=0x12e1dc5
runtime.systemstack()
	src/runtime/asm_amd64.s:496 +0x49 fp=0x7f30066fa258 sp=0x7f30066fa250 pc=0x13282e9