Truffleruby test failure in test_performance_warning... | ruby/ostruct

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There is a current test failure on TruffleRuby, in the test test_performance_warning(TC_OpenStruct).

===============================================================================
Failure: test_performance_warning(TC_OpenStruct):
  pid 1875 exit 0
  | /home/runner/.rubies/truffleruby-24.1.1/lib/mri/rubygems.rb:1207: warning: unstable interpolated regexps cause deoptimization loops which hurt performance significantly, avoid creating regexps dynamically where possible or cache them to fix this
  | -e:1: warning: OpenStruct use is discouraged for performance reasons
  .
  
  1. [2/3] Assertion for "stderr"
     | <["-e:1: warning: OpenStruct use is discouraged for performance reasons"]> expected but was
     | <["/home/runner/.rubies/truffleruby-24.1.1/lib/mri/rubygems.rb:1207: warning: unstable interpolated regexps cause deoptimization loops which hurt performance significantly, avoid creating regexps dynamically where possible or cache them to fix this",
     |  "-e:1: warning: OpenStruct use is discouraged for performance reasons"]>.
     | 
     | diff:
     | + ["/home/runner/.rubies/truffleruby-24.1.1/lib/mri/rubygems.rb:1207: warning: unstable interpolated regexps cause deoptimization loops which hurt performance significantly, avoid creating regexps dynamically where possible or cache them to fix this",
     | - ["-e:1: warning: OpenStruct use is discouraged for performance reasons"]
     | ? ^
     | +  "-e:1: warning: OpenStruct use is discouraged for performance reasons"]
     | ? ^
     | 
     | folded diff:
     | + ["/home/runner/.rubies/truffleruby-24.1.1/lib/mri/rubygems.rb:1207: warning: u
     | + nstable interpolated regexps cause deoptimization loops which hurt performance
     | +  significantly, avoid creating regexps dynamically where possible or cache the
     | + m to fix this",
     | - ["-e:1: warning: OpenStruct use is discouraged for performance reasons"]
     | ? ^
     | +  "-e:1: warning: OpenStruct use is discouraged for performance reasons"]
     | ? ^.
  <false> is not true.
/home/runner/work/ostruct/ostruct/vendor/bundle/truffleruby/3.2.4.24.1.0.1/gems/test-unit-ruby-core-1.0.6/lib/core_assertions.rb:540:in `assert'
/home/runner/work/ostruct/ostruct/vendor/bundle/truffleruby/3.2.4.24.1.0.1/gems/test-unit-ruby-core-1.0.6/lib/core_assertions.rb:774:in `assert_all_assertions'
/home/runner/work/ostruct/ostruct/vendor/bundle/truffleruby/3.2.4.24.1.0.1/gems/test-unit-ruby-core-1.0.6/lib/core_assertions.rb:110:in `assert_in_out_err'
/home/runner/work/ostruct/ostruct/test/ostruct/test_ostruct.rb:425:in `test_performance_warning'

Start with test/ostruct/test_ostruct.rb at test_performance_warning(TC_OpenStruct), then reproduce the failure on TruffleRuby and inspect the stderr assertion. Done means the test no longer fails because of the unexpected rubygems.rb warning while still checking the OpenStruct performance warning.

Written by the indexing model from the issue text.

Truffleruby test failure in test_performance_warning(TC_OpenStruct)

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