Description
Duplicate of: rubygems/bundler#6340. I really think this is more of a bundler issue than one of travis-ci but at least maybe I'll get to fix the problem.
Here is the said build: https://travis-ci.org/tech-angels/vandamme/builds/353287717. The error is happening at https://travis-ci.org/tech-angels/vandamme/jobs/353287720#L852.
As you can see the error is only happening with ruby-head.
The only change in the code base is that I updated dependencies. Previous builds were successful.
$ bundle exec rake
bundler: failed to load command: rake (/home/travis/build/tech-angels/vandamme/vendor/bundle/ruby/2.6.0/bin/rake)
LoadError: cannot load such file -- bundler/dep_proxy
/home/travis/.rvm/rubies/ruby-head/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:888:in `block (2 levels) in expand_dependencies'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:887:in `each'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:887:in `block in expand_dependencies'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:874:in `each'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:874:in `expand_dependencies'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:806:in `converge_locked_specs'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:247:in `resolve'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:170:in `specs'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:237:in `specs_for'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/definition.rb:226:in `requested_specs'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/runtime.rb:108:in `block in definition_method'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/runtime.rb:20:in `setup'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler.rb:107:in `setup'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/setup.rb:10:in `<top (required)>'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/home/travis/.rvm/rubies/ruby-head/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:59:in `require'