Test failure with `make test-bundled-gems`

[hsbt]

I randomly got the following test failures in recent days. I'm not sure why caused these failures with Ruby core and rbs changes.

Error: test_compile(RegexpSingletonTest): NoMethodError: undefined method 'inspect' for an instance of RBS::UnitTest::Convertibles::ToInt
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'Regexp#initialize'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'Regexp.compile'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'block (2 levels) in wrapped_object'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:152:in 'block in RBS::UnitTest::TypeAssertions#send_setup'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:150:in 'Kernel#catch'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:150:in 'RBS::UnitTest::TypeAssertions#send_setup'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:172:in 'RBS::UnitTest::TypeAssertions#assert_send_type'
test/stdlib/Regexp_test.rb:51:in 'block (2 levels) in RegexpSingletonTest#test_compile'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:49:in 'RBS::UnitTest::WithAliases#with_int'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:13:in 'Enumerator#each'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:13:in 'RBS::UnitTest::WithAliases::WithEnum#each'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:30:in 'RBS::UnitTest::WithAliases::WithEnum#and'
test/stdlib/Regexp_test.rb:50:in 'block in RegexpSingletonTest#test_compile'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:60:in 'RBS::UnitTest::WithAliases#with_string'
test/stdlib/Regexp_test.rb:46:in 'RegexpSingletonTest#test_compile'

Error: test_linear_time?(RegexpSingletonTest): NoMethodError: undefined method 'inspect' for an instance of RBS::UnitTest::Convertibles::ToInt
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'Regexp.linear_time?'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'block (2 levels) in wrapped_object'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:152:in 'block in RBS::UnitTest::TypeAssertions#send_setup'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:150:in 'Kernel#catch'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:150:in 'RBS::UnitTest::TypeAssertions#send_setup'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:172:in 'RBS::UnitTest::TypeAssertions#assert_send_type'
test/stdlib/Regexp_test.rb:122:in 'block (2 levels) in RegexpSingletonTest#test_linear_time?'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:49:in 'RBS::UnitTest::WithAliases#with_int'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:13:in 'Enumerator#each'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:13:in 'RBS::UnitTest::WithAliases::WithEnum#each'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:30:in 'RBS::UnitTest::WithAliases::WithEnum#and'
test/stdlib/Regexp_test.rb:121:in 'block in RegexpSingletonTest#test_linear_time?'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:60:in 'RBS::UnitTest::WithAliases#with_string'
test/stdlib/Regexp_test.rb:112:in 'RegexpSingletonTest#test_linear_time?'

Error: test_new(RegexpSingletonTest): NoMethodError: undefined method 'inspect' for an instance of RBS::UnitTest::Convertibles::ToInt
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'Regexp#initialize'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'Class#new'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/spy.rb:92:in 'block (2 levels) in wrapped_object'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:152:in 'block in RBS::UnitTest::TypeAssertions#send_setup'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:150:in 'Kernel#catch'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:150:in 'RBS::UnitTest::TypeAssertions#send_setup'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/type_assertions.rb:172:in 'RBS::UnitTest::TypeAssertions#assert_send_type'
test/stdlib/Regexp_test.rb:233:in 'block (2 levels) in RegexpSingletonTest#test_new'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:49:in 'RBS::UnitTest::WithAliases#with_int'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:13:in 'Enumerator#each'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:13:in 'RBS::UnitTest::WithAliases::WithEnum#each'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:30:in 'RBS::UnitTest::WithAliases::WithEnum#and'
test/stdlib/Regexp_test.rb:232:in 'block in RegexpSingletonTest#test_new'
/Users/hsbt/Documents/github.com/ruby/ruby/gems/src/rbs/lib/rbs/unit_test/with_aliases.rb:60:in 'RBS::UnitTest::WithAliases#with_string'
test/stdlib/Regexp_test.rb:228:in 'RegexpSingletonTest#test_new'