bad pointer in frame main.foo at 0x693f20: 0x201
fatal error: bad pointer in scanbitvector

runtime stack:
runtime.throw(0x55f22b)
	c:/go/src/pkg/runtime/panic.c:520 +0x7e fp=0x23fa80 sp=0x23fa68
scanbitvector(0x511e18, 0x4fdc01, 0x693f20, 0x23fb38, 0x7ffe77347a01, 0x23fd50)
	c:/go/src/pkg/runtime/mgc0.c:1492 +0x3a6 fp=0x23fae8 sp=0x23fa80
scanframe(0x23fbc0, 0x23fd50)
	c:/go/src/pkg/runtime/mgc0.c:1631 +0x1af fp=0x23fb60 sp=0x23fae8
runtime.gentraceback(0x40a6a6, 0x693e58, 0x0, 0xc082016000, 0x6f006600000000, 0x0, 0x7fffffff, 0x408cb0, 0x23fd50, 0x0)
	c:/go/src/pkg/runtime/traceback_x86.c:253 +0x77b fp=0x23fc50 sp=0x23fb60
addstackroots(0xc082016000, 0x23fd50)
	c:/go/src/pkg/runtime/mgc0.c:1692 +0x176 fp=0x23fce0 sp=0x23fc50
markroot(0xc08201a480, 0x5)
	c:/go/src/pkg/runtime/mgc0.c:1321 +0xc5 fp=0x23fd60 sp=0x23fce0
runtime.parfordo(0xc08201a480)
	c:/go/src/pkg/runtime/parfor.c:88 +0xaa fp=0x23fdd8 sp=0x23fd60
gc(0x693e70)
	c:/go/src/pkg/runtime/mgc0.c:2407 +0x1f2 fp=0x23ff08 sp=0x23fdd8
mgc(0xc082016000)
	c:/go/src/pkg/runtime/mgc0.c:2349 +0x35 fp=0x23ff18 sp=0x23ff08
runtime.mcall(0x4281f3)
	c:/go/src/pkg/runtime/asm_amd64.s:181 +0x4e fp=0x23ff28 sp=0x23ff18

goroutine 16 [garbage collection]:
runtime.gc(0xc000000002)
	c:/go/src/pkg/runtime/mgc0.c:2329 +0x206 fp=0x693e88 sp=0x693e58
runtime.GC()
	c:/go/src/pkg/runtime/malloc.goc:853 +0x2d fp=0x693e98 sp=0x693e88
main.foo(0x201, 0x0, 0x3)
	C:/gocode/src/github.com/mozilla/masche/memsearch/foo/foo.go:27 +0xbe fp=0x693f20 sp=0x693e98
main.main()
	C:/gocode/src/github.com/mozilla/masche/memsearch/foo/foo.go:19 +0x68 fp=0x693f50 sp=0x693f20
runtime.main()
	c:/go/src/pkg/runtime/proc.c:247 +0x144 fp=0x693fa8 sp=0x693f50
runtime.goexit()
	c:/go/src/pkg/runtime/proc.c:1445 fp=0x693fb0 sp=0x693fa8
created by _rt0_go
	c:/go/src/pkg/runtime/asm_amd64.s:97 +0x12c

goroutine 17 [syscall]:
runtime.notetsleepg(0x6cff60, 0xdf8475800)
	c:/go/src/pkg/runtime/lock_sema.c:263 +0x94 fp=0x6cff38 sp=0x6cff08
runtime.MHeap_Scavenger()
	c:/go/src/pkg/runtime/mheap.c:532 +0xb8 fp=0x6cffa8 sp=0x6cff38
runtime.goexit()
	c:/go/src/pkg/runtime/proc.c:1445 fp=0x6cffb0 sp=0x6cffa8
created by runtime.main
	c:/go/src/pkg/runtime/proc.c:207

goroutine 18 [GC sweep wait]:
runtime.park(0x4151b0, 0x560cc0, 0x55f460)
	c:/go/src/pkg/runtime/proc.c:1369 +0xac fp=0x6cbf70 sp=0x6cbf60
runtime.parkunlock(0x560cc0, 0x55f460)
	c:/go/src/pkg/runtime/proc.c:1385 +0x42 fp=0x6cbf90 sp=0x6cbf70
bgsweep()
	c:/go/src/pkg/runtime/mgc0.c:1993 +0xaf fp=0x6cbfa8 sp=0x6cbf90
runtime.goexit()
	c:/go/src/pkg/runtime/proc.c:1445 fp=0x6cbfb0 sp=0x6cbfa8
created by runtime.gc
	c:/go/src/pkg/runtime/mgc0.c:2268

goroutine 17 [syscall]:
runtime.goexit()
	c:/go/src/pkg/runtime/proc.c:1445 fp=0xc082023fb0 sp=0xc082023fa8

goroutine 19 [finalizer wait]:
runtime.park(0x4151b0, 0x560ca8, 0x55f649)
	c:/go/src/pkg/runtime/proc.c:1369 +0xac fp=0x6c7f18 sp=0x6c7f08
runtime.parkunlock(0x560ca8, 0x55f649)
	c:/go/src/pkg/runtime/proc.c:1385 +0x42 fp=0x6c7f38 sp=0x6c7f18
runfinq()
	c:/go/src/pkg/runtime/mgc0.c:2644 +0xdd fp=0x6c7fa8 sp=0x6c7f38
runtime.goexit()
	c:/go/src/pkg/runtime/proc.c:1445 fp=0x6c7fb0 sp=0x6c7fa8
created by runtime.gc
	c:/go/src/pkg/runtime/mgc0.c:2268