can't start julia from non-directory

[vtjnash]

$ mkdir nonexist
$ cd nonexist
$ rmdir ../nonexist
$ ~/julia/julia
julia: /home/jameson/julia/deps/llvm-3.3/lib/Support/Unix/Path.inc:256: static llvm::sys::Path llvm::sys::Path::GetCurrentDirectory(): Assertion `false && "Could not query current working directory."' failed.
Aborted

[JeffBezanson]

What do you suggest? Should we check for this and give a better error?

[StefanKarpinski]

Can we avoid having LLVM throw this exception? Why does LLVM need the path? Perhaps this could be fixed upstream.

[vtjnash]

there's no need to block startup. just error if you try to access it:

shell> rmdir ../nonexist

julia> pwd()
ERROR: getcwd: no such file or directory (ENOENT)
 in uv_error at ./stream.jl:946
 in pwd at ./file.jl:8

[JeffBezanson]

Agreed. Does this still happen when llvm assertions are disabled?

[ihnorton]

Does this still happen when llvm assertions are disabled?

Just tested with an old nightly: no.

(for reference, on LLVM 3.3: hhttps://github.com/llvm-mirror/llvm/blob/bec3ce0cb50895d9b41a78938b079672e6999e15/lib/Support/Unix/Path.inc#L252-L258)

[ihnorton]

Looks like this may have been fixed in recent LLVM versions. GetCurrentDirectory was removed, and the (apparent) replacement current_path does not appear to assert?, as of at least LLVM 3.5.

[timholy]

This may have regressed, see #17998.