catch ispath errors on discovery

[una-dinosauria]

paths might contain system paths where running ls is forbidden. This change simply allows the program to continue even if the exception is raised on some paths.

[maleadt]

ispath can throw? What does that have to do with runnin ls; doesn't ispath just check the stat info?
The unique call should probably still be outside the try..catch though, or in the case of an exception multiple identical paths can be considered (triggering warnings later on).

[una-dinosauria]

ispath can throw?

It's throwing on my machine.

What does that have to do with runnin ls; doesn't ispath just check the stat info?

Ah correct. ispath calls stat, which is the culprit.

julia> paths[16]
"/var/cfengine/bin/nvidia-smi"

julia> ispath(paths[16])
ERROR: stat: permission denied (EACCES)
Stacktrace:
 [1] stat(::String) at ./stat.jl:69
 [2] ispath(::String) at ./stat.jl:279

The unique call should probably still be outside the try..catch though, or in the case of an exception multiple identical paths can be considered (triggering warnings later on).

I've pushed that change.