Install fails on travis-ci.com

[eford]

I'm able to add and use the NBInclude package on my system. But when I try to add the NBInclude package in travis-ci.com, it core dumps. You can see the problem at https://github.com/PsuAstro528/HomeworkTemplate/tree/v0.7
and
https://travis-ci.com/PsuAstro528/HomeworkTemplate/builds/93116947

Note that since this is for classroom use, student's won't be creating a package for every assignment. Hence I wrote a simpler parser to have travis add packages that are used for the exercise based on a REQUIRE file.

Here's the .travis.yml file
language: julia
os:

• linux
  julia:
• 1.0

script:

• julia test/install_required_pacakges.jl
• julia test/runtests.jl

In essence the test/install_required_packages.jl file
is just doing
import Pkg
Pkg.add("Glob")
Pkg.add("NBInclude")

Is this something that can be fixed by NBInclude? Or is it deeper? Any suggestions?
Thanks.

[eford]

It turns out this wasn't a problem with NBInclude. When different package lists were installed, it appeared to happen randomly. In the end, I removed my install_required_packages.jl script and learned to use julia "Projects" to have Julia install packages. I don't understand why the old way didn't work, but so far the new way is working. The new .travis.yml is
language: julia
os:

• linux
  julia:
• 1.0

script:

• julia -e 'using Pkg; Pkg.activate("."); Pkg.instantiate();'
• julia test/runtests.jl