stringio redefined warnings

[mmenanno]

I was trying to narrow down an issue for something else and stumbled across some weird stringio conflicts again.

I did:

rails new test_application 
cd test_appliction
bundle add toys

Then I created a .toys.rb with this as the content:

expand :minitest, files: ["test/**/*_test.rb"], libs: ["test", "lib"]

When running rake test I have no issues, but if I run toys test I get:

/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: already initialized constant StringIO::VERSION
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old new
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old open
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old initialize
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old initialize_copy
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old reopen
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old string
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old string=
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old lineno
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old lineno=
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old binmode
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old close
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old close_read
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old close_write
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old closed?
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old closed_read?
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old closed_write?
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old eof
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old eof?
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old fcntl
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old flush
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old fsync
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old pos
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old pos=
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old rewind
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old seek
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old sync
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old sync=
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old tell
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old each
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old each_line
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old each_byte
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old each_char
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old each_codepoint
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old getc
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old ungetc
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old ungetbyte
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old getbyte
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old gets
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old readlines
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old read
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old write
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old putc
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old isatty
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old tty?
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old pid
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old fileno
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old size
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old length
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old truncate
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old external_encoding
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old internal_encoding
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old set_encoding
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old set_encoding_by_bom
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old readchar
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old readbyte
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old readline
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old sysread
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old readpartial
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old read_nonblock
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old <<
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old print
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old printf
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old puts
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old syswrite
/Users/username/.gem/ruby/3.2.2/gems/stringio-3.0.8/lib/stringio.bundle: warning: method redefined; discarding old write_nonblock
Running 0 tests in a single process (parallelization threshold is 50)
Run options: --seed 27806

# Running:



Finished in 0.000350s, 0.0000 runs/s, 0.0000 assertions/s.
0 runs, 0 assertions, 0 failures, 0 errors, 0 skips

This is with the latest toys 0.15.2, ruby 3.2.2, and rails 7.1.1 on macOS Sonoma (14.0)

[dazuma]

Try removing toys from the bundle and see if that helps. Otherwise I'll take another look.

[dazuma]

I spent a few moments looking at this today. One workaround I found is to tell Toys to manage the bundle, rather than depending on Rails to do the bundle setup in boot.rb. You can do this by adding bundler: true to the minitest template expansion, i.e.

expand :minitest, files: ["test/**/*_test.rb"], libs: ["test", "lib"], bundler: true

As for why we're getting the stringio issue with Rails, I haven't yet connected all the dots, but has something to do with Toys using stringio, then Rails loading a different version in its bundle. As with the other issue you filed, the root of the problem seems to be that Rubygems isn't recognizing stringio properly as a built-in gem, and is allowing multiple versions of it to load. For example, you can reproduce the issue without Toys, just by adding require "stringio" to the start of bin/rake and then running bin/rake test. I think, ultimately, we're going to have to open an issue against Rubygems for this. I'll look into it more when I have some time next week.

[dazuma]

I released a workaround in Toys 0.15.3. Turns out that Minitest itself was doin the initial pre-bundle loading of stringio, so I moved require "minitest" to the end of the script that Toys runs to invoke the tests.