[ruby-core:83206] [Ruby trunk Bug#13997][Feedback] Bundler gem binstub broken

Issue #13997 has been updated by hsbt (Hiroshi SHIBATA).

Status changed from Open to Feedback

Thanks, Terence.

```/tmp/bundler/lib/ruby/gems/2.5.0/gems/bundler-1.15.4/exe/bundle``` is not default gem environment on Ruby 2.5.0preview1.

Can you show reproduce instructions for this issue?



----------------------------------------
Bug #13997: Bundler gem binstub broken
https://bugs.ruby-lang.org/issues/13997#change-67153

* Author: hone (Terence Lee)
* Status: Feedback
* Priority: Normal
* Assignee: hsbt (Hiroshi SHIBATA)
* Target version: 2.5
* ruby -v: ruby 2.5.0preview1 (2017-10-10 trunk 60153) [x86_64-linux]
* Backport: 
----------------------------------------
Hi,

In Ruby 2.5.0-preview1, I'm seeing the following error if the Rubygems binstub PATH precedes the binstubs from ruby and the Bundler version installed is <= 1.15.4 (what ruby vendors).

~~~
/home/hone/.rvm/gems/ruby-2.4.1@global/bin/bundle:22:in `load': /tmp/bundler/lib/ruby/gems/2.5.0/gems/bundler-1.15.4/exe/bundle:4: syntax error, unexpected tSTRING_BEG, expecting keyword_do or '{' or '(' (SyntaxError)
exec "$bindir/ruby" -x "$0" "$@"
                       ^
/tmp/bundler/lib/ruby/gems/2.5.0/gems/bundler-1.15.4/exe/bundle:9: syntax error, unexpected keyword_do_block, expecting end-of-input
Signal.trap("INT") do
~~~

The reason for this is because the generated bundler binstub by rubygems runs code like this:

~~~
load Gem.bin_path('bundler', 'bundle', '>= 0.a')
~~~

The problem is that the binstub from the vendored bundler in ruby is not pure ruby:

~~~
#!/bin/sh
# -*- ruby -*-
bindir="${0%/*}"
exec "$bindir/ruby" -x "$0" "$@"
~~~

The top of this file is shell and not ruby. Kernel#load chokes on this.

Thanks,
Terence



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