Debug no memory

[soutaro]

https://github.com/ruby/ruby/actions/runs/20480628393/job/58853288287#step:22:353

  D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/testcase.rb:641:in 'block (2 levels) in Test::Unit::TestCase#run': failed to allocate memory (NoMemoryError)
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/fixture.rb:276:in 'block in Test::Unit::Fixture#create_fixtures_runner'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/fixture.rb:276:in 'block in Test::Unit::Fixture#create_fixtures_runner'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/fixture.rb:257:in 'Test::Unit::Fixture#run_fixture'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/fixture.rb:292:in 'Test::Unit::Fixture#run_setup'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/testcase.rb:632:in 'block in Test::Unit::TestCase#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/testcase.rb:631:in 'Kernel#catch'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/testcase.rb:631:in 'Test::Unit::TestCase#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:97:in 'Test::Unit::TestSuiteRunner#run_test'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:63:in 'block in Test::Unit::TestSuiteRunner#run_tests'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:62:in 'Array#each'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:62:in 'Test::Unit::TestSuiteRunner#run_tests'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:39:in 'Test::Unit::TestSuiteRunner#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/testsuite.rb:77:in 'Test::Unit::TestSuite#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:97:in 'Test::Unit::TestSuiteRunner#run_test'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:63:in 'block in Test::Unit::TestSuiteRunner#run_tests'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:62:in 'Array#each'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:62:in 'Test::Unit::TestSuiteRunner#run_tests'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:39:in 'Test::Unit::TestSuiteRunner#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/testsuite.rb:77:in 'Test::Unit::TestSuite#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/ui/testrunnermediator.rb:79:in 'Test::Unit::UI::TestRunnerMediator#run_suite'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/ui/testrunnermediator.rb:55:in 'block (3 levels) in Test::Unit::UI::TestRunnerMediator#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/ui/testrunnermediator.rb:50:in 'Kernel#catch'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/ui/testrunnermediator.rb:50:in 'block (2 levels) in Test::Unit::UI::TestRunnerMediator#run'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/test-suite-runner.rb:19:in 'Test::Unit::TestSuiteRunner.run_all_tests'
  	from D:/a/ruby/ruby/src/.bundle/gems/test-unit-3.7.5/lib/test/unit/ui/testrunnermediator.rb:49:in 'block in Test::Unit::UI::TestRunnerMediator#run'