libuv git submodule pointing to non-existent tree?

[drewm1980]

I am attempting to build Julia on Debian GNU/Linux 6.0. I'd tell you what git version I'm on (updated master branch today), but git status is hanging.

I re-ran make about 20 times because it kept exiting with uninformative errors, but then kept finding new targets to build. Finally I got stuck on:

fatal: reference is not a tree: a6d3d8f90f6177d782a5f6cc143e60216ccd3567
Unable to checkout 'a6d3d8f90f6177d782a5f6cc143e60216ccd3567' in submodule path 'deps/libuv'
make[2]: *** [libuv/Makefile] Error 1
make[1]: *** [julia-release] Error 2
make: *** [release] Error 2

Cheers,
Andrew

[ViralBShah]

I updated today, but didn't face any such issue. @loladiro ?

[StefanKarpinski]

Maybe git submodule update will help?

[Keno]

The ref definitely exists: JuliaLang/libuv@a6d3d8f. If Stefan's suggestion doesn't work try deleting the deps/libuv directory.

[StefanKarpinski]

Ok, I would try just doing git --version which shouldn't attempt to check the status, which is probably confusing your git because your git is too old to know about submodules. So basically, I think your git is too old. Recommendation: get a newer git, either via debian, or compile one from source (you can probably git clone git itself even using a really old version of git). Installing git from source is pretty painless and I would recommend it. I run a hand-compiled git version. The worst part is actually generating the docs, which requires asciidoc, which depends on everything in the entire world, and takes forever.

[StefanKarpinski]

The key word here is tree — this aged git is looking for a tree, not a commit. And yes, the tree does not exist — because that object isn't a tree.

[drewm1980]

git submodule init and update did not work. Blowing away the deps/libuv directory and re-runing make worked, and my compile is continuing. Thanks!