can't modify frozen string

[quinn]

possibly related to #4459. Happening again in 1.12.

• What did you do?

  I ran the command /usr/local/bin/bundle install --path /var/www/.../shared/bundle --without development test --deployment --quiet

• What did you expect to happen?

  Install the gems. This has worked previously on this host.

• What happened instead?

  error

Error details

RuntimeError: can't modify frozen String
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/definition.rb:432:in `pretty_dep'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/definition.rb:374:in `block in ensure_equivalent_gemfile_and_lockfile'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/definition.rb:374:in `map'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/definition.rb:374:in `ensure_equivalent_gemfile_and_lockfile'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/installer.rb:61:in `run'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/installer.rb:22:in `install'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/cli/install.rb:102:in `run'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/cli.rb:175:in `install'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/vendor/thor/lib/thor.rb:359:in `dispatch'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/vendor/thor/lib/thor/base.rb:440:in `start'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/cli.rb:11:in `start'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/exe/bundle:27:in `block in <top (required)>'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/lib/bundler/friendly_errors.rb:98:in `with_friendly_errors'
  /var/lib/gems/2.3.0/gems/bundler-1.12.1/exe/bundle:19:in `<top (required)>'
  /usr/local/bin/bundle:23:in `load'
  /usr/local/bin/bundle:23:in `<main>'

Environment

Bundler 1.12.1
Rubygems 2.5.1
Ruby 2.3.0p0 (2015-12-25 revision 0) [x86_64-linux-gnu]
GEM_HOME /var/www/.../shared/bundle/ruby/2.3.0
GEM_PATH
Git 2.7.4

  Bundler settings

frozen
Set for your local app (/var/www/.../releases/20160503152753/.bundle/config): "1"
path
Set for your local app (/var/www/.../releases/20160503152753/.bundle/config): "/var/www/.../shared/bundle"
without
Set for your local app (/var/www/.../releases/20160503152753/.bundle/config): "development:test"
disable_shared_gems
Set for your local app (/var/www/.../releases/20160503152753/.bundle/config): true
orig_path
Set via BUNDLE_ORIG_PATH: "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

[quinn]

ubuntu xenial apt ruby (2.3.0)

[quinn]

my lock file was out of date :( but that typically produces a more helpful error with --deployment