Go 1.4 errors on Mac OSX since upgrading to Sierra

[robinzimmermann]

My installation used to work fine, until I upgraded my Mac to Sierra. Now I get errors like the following when I'm in a directory that is a git repo:

$ git status
failed MSpanList_Insert 0x761000 0x38b6295a691 0x0
fatal error: MSpanList_Insert

runtime stack:
runtime.throw(0x67580b)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/panic.go:491 +0xad fp=0x7fff5fbff0f0 sp=0x7fff5fbff0c0
runtime.MSpanList_Insert(0x69f208, 0x761000)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mheap.c:692 +0x8f fp=0x7fff5fbff118 sp=0x7fff5fbff0f0
MHeap_FreeSpanLocked(0x69be00, 0x761000, 0x100)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mheap.c:583 +0x163 fp=0x7fff5fbff158 sp=0x7fff5fbff118
MHeap_Grow(0x69be00, 0x8, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mheap.c:420 +0x1a8 fp=0x7fff5fbff198 sp=0x7fff5fbff158
MHeap_AllocSpanLocked(0x69be00, 0x1, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mheap.c:298 +0x365 fp=0x7fff5fbff1d8 sp=0x7fff5fbff198
mheap_alloc(0x69be00, 0x1, 0x12, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mheap.c:190 +0x121 fp=0x7fff5fbff200 sp=0x7fff5fbff1d8
runtime.MHeap_Alloc(0x69be00, 0x1, 0x10000000012, 0xcf29)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mheap.c:240 +0x66 fp=0x7fff5fbff238 sp=0x7fff5fbff200
MCentral_Grow(0x6a3b78, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mcentral.c:197 +0x8b fp=0x7fff5fbff2a0 sp=0x7fff5fbff238
runtime.MCentral_CacheSpan(0x6a3b78, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mcentral.c:85 +0x167 fp=0x7fff5fbff2d8 sp=0x7fff5fbff2a0
runtime.MCache_Refill(0x75d000, 0x12, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/mcache.c:90 +0xa0 fp=0x7fff5fbff300 sp=0x7fff5fbff2d8
runtime.mcacheRefill_m()
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/malloc.c:368 +0x57 fp=0x7fff5fbff320 sp=0x7fff5fbff300
runtime.onM(0x5327a8)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/asm_amd64.s:273 +0x9a fp=0x7fff5fbff328 sp=0x7fff5fbff320
runtime.mallocgc(0x120, 0x444dc0, 0x0, 0x0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/malloc.go:178 +0x849 fp=0x7fff5fbff3d8 sp=0x7fff5fbff328
runtime.newobject(0x444dc0, 0x75d000)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/malloc.go:353 +0x49 fp=0x7fff5fbff400 sp=0x7fff5fbff3d8
runtime.newG(0x268ca)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/proc.go:233 +0x2a fp=0x7fff5fbff418 sp=0x7fff5fbff400
allocg(0x68bb00)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/proc.c:925 +0x1f fp=0x7fff5fbff428 sp=0x7fff5fbff418
runtime.malg(0x8000, 0x68bcc0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/proc.c:2106 +0x1f fp=0x7fff5fbff458 sp=0x7fff5fbff428
runtime.mpreinit(0x68c2e0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/os_darwin.c:137 +0x27 fp=0x7fff5fbff470 sp=0x7fff5fbff458
mcommoninit(0x68c2e0)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/proc.c:201 +0xc9 fp=0x7fff5fbff498 sp=0x7fff5fbff470
runtime.schedinit()
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/proc.c:138 +0x55 fp=0x7fff5fbff4c0 sp=0x7fff5fbff498
runtime.rt0_go(0x7fff5fbff4f8, 0x2, 0x7fff5fbff4f8, 0x0, 0x0, 0x2, 0x7fff5fbff6d8, 0x7fff5fbff6dc, 0x0, 0x7fff5fbff6e3, ...)
	/usr/local/Cellar/go/1.4.1/libexec/src/runtime/asm_amd64.s:95 +0x116 fp=0x7fff5fbff4c8 sp=0x7fff5fbff4c0

These errors occur randomly and non-deterministically. But they do occur reliably, approximately every 5-10 commands. If I just type git status over and over the error will occur after a few goes.

It seems like bash-git-prompt is the cause because if I remove it from my .bash_profile then the errors go away.

From my reading around the internet, it looks like Go 1.4 has some known issue with Sierra. I have upgraded Go on my machine, as recommended, but it hasn't helped.

In fact, the path referenced in the error doesn't exist on my machine: /usr/local/Cellar/go/1.4.1

Further reading has suggested that perhaps the application is using a Go library from 1.4, and should be rebuilt using a newer version of Go (1.7 or higher, I think). I don't see any Go in the source, but the errors for sure go away when I remove git-bash-prompt. So I can only conclude it has something to do with git-bash-prompt in some way.

I'm looking for any suggestions or ideas what will relieve my pain. I've used git-bash-prompt for a while and have configured it to perfection. But I can't put up with these constant errors for much longer.

[magicmonty]

This git prompt is bash only. There is no dependency on Go. Maybe there is some other thing, that manipulates the prompt too but with go?

[magicmonty]

it seems to have more to do with git than with this prompt: https://github.com/golang/go/issues/17570 https://github.com/smartystreets/goconvey/issues/455

[robinzimmermann]

Thanks, @magicmonty. The weird part is that the errors don't occur if I turn off bash-git-prompt.

Perhaps bash-git-prompt is doing something with git under the covers that I don't normally do, such as using a different command or different options.

It's probably not bash-git-prompt per se, but some interplay between bash-git-prompt and git that's causing the problem. I'm just not sure how to get to the bottom of it.

[magicmonty]

Sure, this prompt relies on Git to get the Git information to display. So if Git is broken, so the prompt will break too.

[er0ck]

i had this issue due to hub. do you have hub installed? brew unlink hub; brew install hub fixed it for me

[robinzimmermann]

That seems to have fixed it, @er0ck. I'll see how it goes over the next couple of days, but so far it hasn't reproduced.

This has caused me months of pain, so thank you very much!!!

[ferventcoder]

@er0ck this fixed an issue I thought I had fixed before. Thanks!