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Fix frozen string literal warnings in PP #15037

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Fix frozen string literal warnings in PP #15037

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@zzak zzak commented Nov 3, 2025 

ruby/3.5.0+4/prettyprint.rb:184: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information)
ruby/3.5.0+4/prettyprint.rb:541: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information)

I'm not sure if dup is bad idea here or we should not use << but that is the documented API:

ruby/lib/prettyprint.rb

Lines 69 to 70 in 4a3d834

# +output+ is an output target. If it is not specified, '' is assumed. It
# should have a << method which accepts the first argument +obj+ of

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❌ 140/33975 Tests Failed

test/rubygems/test_gem_source_git.rb#test_pretty_print 
Failure:
TestGemSourceGit#test_pretty_print [D:/a/ruby/ruby/src/test/rubygems/test_gem_source_git.rb:296]:
<> (UTF-8) expected but was
<> (UTF-8).
test/rubygems/test_gem_source_installed.rb#test_pretty_print 
Failure:
TestGemSourceInstalled#test_pretty_print [D:/a/ruby/ruby/src/test/rubygems/test_gem_source_installed.rb:38]:
<> (UTF-8) expected but was
<> (UTF-8).
test/rubygems/test_gem_source_local.rb#test_pretty_print 
Failure:
TestGemSourceLocal#test_pretty_print [D:/a/ruby/ruby/src/test/rubygems/test_gem_source_local.rb:110]:
<> (UTF-8) expected but was
<> (UTF-8).
test/rubygems/test_gem_source_specific_file.rb#test_pretty_print 
Failure:
TestGemSourceSpecificFile#test_pretty_print [D:/a/ruby/ruby/src/test/rubygems/test_gem_source_specific_file.rb:78]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_begin 
Failure:
TestAst#test_error_tolerant_end_is_short_for_begin [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1004]:
<> (UTF-8) expected but was
<> (UTF-8).
135 more failed tests
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_case 
Failure:
TestAst#test_error_tolerant_end_is_short_for_case [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1091]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_class 
Failure:
TestAst#test_error_tolerant_end_is_short_for_class [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1170]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_do 
Failure:
TestAst#test_error_tolerant_end_is_short_for_do [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1196]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_do_block 
Failure:
TestAst#test_error_tolerant_end_is_short_for_do_block [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1210]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_do_LAMBDA 
Failure:
TestAst#test_error_tolerant_end_is_short_for_do_LAMBDA [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1224]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_for 
Failure:
TestAst#test_error_tolerant_end_is_short_for_for [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1142]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_if 
Failure:
TestAst#test_error_tolerant_end_is_short_for_if [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1013]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_method_define 
Failure:
TestAst#test_error_tolerant_end_is_short_for_method_define [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:946]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_module 
Failure:
TestAst#test_error_tolerant_end_is_short_for_module [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1183]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_singleton_method_define 
Failure:
TestAst#test_error_tolerant_end_is_short_for_singleton_method_define [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:976]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_unless 
Failure:
TestAst#test_error_tolerant_end_is_short_for_unless [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1040]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_until 
Failure:
TestAst#test_error_tolerant_end_is_short_for_until [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1079]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_end_is_short_for_while 
Failure:
TestAst#test_error_tolerant_end_is_short_for_while [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1067]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_expr_value_can_be_error 
Failure:
TestAst#test_error_tolerant_expr_value_can_be_error [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1299]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_treat_end_as_keyword_based_on_indent 
Failure:
TestAst#test_error_tolerant_treat_end_as_keyword_based_on_indent [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1252]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_error_tolerant_unexpected_backslash 
Failure:
TestAst#test_error_tolerant_unexpected_backslash [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:1330]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_return 
Failure:
TestAst#test_return [/Users/runner/work/ruby/ruby/src/test/ruby/test_ast.rb:770]:
<> (UTF-8) expected but was
<> (UTF-8).
test/ruby/test_ast.rb#test_with_bom 
Failure:
TestAst#test_with_bom [D:/a/ruby/ruby/src/test/ruby/test_ast.rb:1337]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_lasgn_literal 
Error:
PPTestModule::PPAbstractSyntaxTree#test_lasgn_literal:
Test::Unit::ProxyError: undefined method 'empty?' for an instance of RubyVM::AbstractSyntaxTree::Node
    D:/a/ruby/ruby/src/test/test_pp.rb:345:in 'PPTestModule::PPAbstractSyntaxTree#test_lasgn_literal'
test/test_pp.rb#test_anonymous 
Failure:
PPTestModule::PPCycleTest#test_anonymous [D:/a/ruby/ruby/src/test/test_pp.rb:231]:
<> (ASCII-8BIT) expected but was
<> (UTF-8).
test/test_pp.rb#test_array 
Failure:
PPTestModule::PPCycleTest#test_array [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:164]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_data 
Failure:
PPTestModule::PPCycleTest#test_data [D:/a/ruby/ruby/src/test/test_pp.rb:199]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_data_private_member 
Failure:
PPTestModule::PPCycleTest#test_data_private_member [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:211]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_data_removed_member 
Failure:
PPTestModule::PPCycleTest#test_data_removed_member [D:/a/ruby/ruby/src/test/test_pp.rb:219]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_hash 
Failure:
PPTestModule::PPCycleTest#test_hash [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:171]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_object 
Failure:
PPTestModule::PPCycleTest#test_object [D:/a/ruby/ruby/src/test/test_pp.rb:226]:
<> (ASCII-8BIT) expected but was
<> (UTF-8).
test/test_pp.rb#test_set 
Failure:
PPTestModule::PPCycleTest#test_set [D:/a/ruby/ruby/src/test/test_pp.rb:177]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_share_nil 
Failure:
PPTestModule::PPCycleTest#test_share_nil [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:246]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_struct 
Failure:
PPTestModule::PPCycleTest#test_struct [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:184]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_withinspect 
Failure:
PPTestModule::PPCycleTest#test_withinspect [D:/a/ruby/ruby/src/test/test_pp.rb:238]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_delegate 
Failure:
PPTestModule::PPDelegateTest#test_delegate [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:314]:
[ruby-core:25804].
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_hash_override 
Failure:
PPTestModule::PPInheritedTest#test_hash_override [D:/a/ruby/ruby/src/test/test_pp.rb:370]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_basic_object 
Failure:
PPTestModule::PPInspectTest#test_basic_object [D:/a/ruby/ruby/src/test/test_pp.rb:156]:
Expected  to match .
test/test_pp.rb#test_hasboth 
Failure:
PPTestModule::PPInspectTest#test_hasboth [D:/a/ruby/ruby/src/test/test_pp.rb:110]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_hasinspect 
Failure:
PPTestModule::PPInspectTest#test_hasinspect [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:100]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_hasprettyprint 
Failure:
PPTestModule::PPInspectTest#test_hasprettyprint [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:105]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_iv_hiding 
Failure:
PPTestModule::PPInspectTest#test_iv_hiding [D:/a/ruby/ruby/src/test/test_pp.rb:144]:
Expected  to match .
test/test_pp.rb#test_iv_hiding_via_ruby 
Failure:
PPTestModule::PPInspectTest#test_iv_hiding_via_ruby [D:/a/ruby/ruby/src/test/test_pp.rb:151]:
Expected  to match .
test/test_pp.rb#test_pretty_print_inspect 
Failure:
PPTestModule::PPInspectTest#test_pretty_print_inspect [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:115]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_proc 
Failure:
PPTestModule::PPInspectTest#test_proc [D:/a/ruby/ruby/src/test/test_pp.rb:122]:
<> (ASCII-8BIT) expected but was
<> (UTF-8).
test/test_pp.rb#test_to_s_with_iv 
Failure:
PPTestModule::PPInspectTest#test_to_s_with_iv [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:130]:
<> (ASCII-8BIT) expected but was
<> (UTF-8).
test/test_pp.rb#test_to_s_without_iv 
Failure:
PPTestModule::PPInspectTest#test_to_s_without_iv [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:137]:
<> (ASCII-8BIT) expected but was
<> (UTF-8).
test/test_pp.rb#test_direct_pp 
Failure:
PPTestModule::PPSingleLineTest#test_direct_pp [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:306]:
<> (UTF-8) expected but was
<> (ASCII-8BIT).
test/test_pp.rb#test_hash 
Failure:
PPTestModule::PPSingleLineTest#test_hash [D:/a/ruby/ruby/src/test/test_pp.rb:255]:
<> (US-ASCII) expected but was
<> (UTF-8).
test/test_pp.rb#test_hash_in_array 
Failure:
PPTestModule::PPSingleLineTest#test_hash_in_array [D:/a/ruby/ruby/src/test/test_pp.rb:276]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_hash_symbol_colon_key 
Failure:
PPTestModule::PPSingleLineTest#test_hash_symbol_colon_key [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:266]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_list0123_11 
Failure:
PPTestModule::PPTest#test_list0123_11 [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:19]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_list0123_12 
Failure:
PPTestModule::PPTest#test_list0123_12 [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:15]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_range 
Failure:
PPTestModule::PPTest#test_range [D:/a/ruby/ruby/src/test/test_pp.rb:40]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_redefined_method 
Failure:
PPTestModule::PPTest#test_redefined_method [/Users/runner/work/ruby/ruby/src/test/test_pp.rb:36]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_set 
Failure:
PPTestModule::PPTest#test_set [D:/a/ruby/ruby/src/test/test_pp.rb:23]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_pp.rb#test_struct_override_members 
Failure:
PPTestModule::PPTest#test_struct_override_members [D:/a/ruby/ruby/src/test/test_pp.rb:29]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_00_06 
Failure:
PrettyPrintTest::Fill#test_00_06 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:460]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_07_10 
Failure:
PrettyPrintTest::Fill#test_07_10 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:471]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_11_14 
Failure:
PrettyPrintTest::Fill#test_11_14 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:481]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_15_18 
Failure:
PrettyPrintTest::Fill#test_15_18 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:490]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_19_22 
Failure:
PrettyPrintTest::Fill#test_19_22 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:499]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_23_26 
Failure:
PrettyPrintTest::Fill#test_23_26 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:508]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_27 
Failure:
PrettyPrintTest::Fill#test_27 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:516]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_6 
Failure:
PrettyPrintTest::NonString#test_6 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:420]:
<> expected but was
<>.
test/test_prettyprint.rb#test_7 
Failure:
PrettyPrintTest::NonString#test_7 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:424]:
<> expected but was
<>.
test/test_prettyprint.rb#test_00_04 
Failure:
PrettyPrintTest::StrictPrettyExample#test_00_04 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:287]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_05 
Failure:
PrettyPrintTest::StrictPrettyExample#test_05 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:305]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_06 
Failure:
PrettyPrintTest::StrictPrettyExample#test_06 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:320]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_07 
Failure:
PrettyPrintTest::StrictPrettyExample#test_07 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:334]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_08 
Failure:
PrettyPrintTest::StrictPrettyExample#test_08 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:346]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_09 
Failure:
PrettyPrintTest::StrictPrettyExample#test_09 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:357]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_10 
Failure:
PrettyPrintTest::StrictPrettyExample#test_10 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:367]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_11_31 
Failure:
PrettyPrintTest::StrictPrettyExample#test_11_31 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:376]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_32 
Failure:
PrettyPrintTest::StrictPrettyExample#test_32 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:385]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_1 
Failure:
PrettyPrintTest::TailGroup#test_1 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:406]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_hello_00_06 
Failure:
PrettyPrintTest::WadlerExample#test_hello_00_06 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:44]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_hello_07_08 
Failure:
PrettyPrintTest::WadlerExample#test_hello_07_08 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:55]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_hello_09_10 
Failure:
PrettyPrintTest::WadlerExample#test_hello_09_10 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:65]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_hello_11_12 
Failure:
PrettyPrintTest::WadlerExample#test_hello_11_12 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:74]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_hello_13 
Failure:
PrettyPrintTest::WadlerExample#test_hello_13 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:82]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_00_19 
Failure:
PrettyPrintTest::WadlerExample#test_tree_00_19 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:98]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_20_22 
Failure:
PrettyPrintTest::WadlerExample#test_tree_20_22 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:110]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_23_43 
Failure:
PrettyPrintTest::WadlerExample#test_tree_23_43 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:120]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_44 
Failure:
PrettyPrintTest::WadlerExample#test_tree_44 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:125]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_alt_00_18 
Failure:
PrettyPrintTest::WadlerExample#test_tree_alt_00_18 [D:/a/ruby/ruby/src/test/test_prettyprint.rb:149]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_alt_19_20 
Failure:
PrettyPrintTest::WadlerExample#test_tree_alt_19_20 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:165]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_alt_20_49 
Failure:
PrettyPrintTest::WadlerExample#test_tree_alt_20_49 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:177]:
<> (UTF-8) expected but was
<> (UTF-8).
test/test_prettyprint.rb#test_tree_alt_50 
Failure:
PrettyPrintTest::WadlerExample#test_tree_alt_50 [/Users/runner/work/ruby/ruby/src/test/test_prettyprint.rb:185]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_empty_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_empty_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:502]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_collection_array_hex_invisible 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_collection_array_hex_invisible [D:/a/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:516]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_collection_hash_hex_invisible 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_collection_hash_hex_invisible [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:528]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_diff_deactivated 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_diff_deactivated [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:535]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_escaped_newline 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_escaped_newline [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:630]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_hex 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_hex [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:554]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_hex_invisible 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_hex_invisible [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:566]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_long 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_long [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:575]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_long_invisible 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_long_invisible [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:587]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_long_msg 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_long_msg [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:602]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_short 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_short [/tmp/_actions-runner-working-dir/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:610]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_short_msg 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_short_msg [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:616]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_equal_different_short_multiline 
Failure:
TestMiniTestUnitTestCase#test_assert_equal_different_short_multiline [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:623]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_includes_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_includes_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:708]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_instance_of_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_instance_of_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:716]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_kind_of_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_kind_of_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:726]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_match_object_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_match_object_triggered [/tmp/_actions-runner-working-dir/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:761]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_match_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_match_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:768]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_nil_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_nil_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:778]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_operator_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_operator_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:795]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_output_triggered_both 
Failure:
TestMiniTestUnitTestCase#test_assert_output_triggered_both [D:/a/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:839]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_output_triggered_err 
Failure:
TestMiniTestUnitTestCase#test_assert_output_triggered_err [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:848]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_output_triggered_out 
Failure:
TestMiniTestUnitTestCase#test_assert_output_triggered_out [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:856]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_predicate_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_predicate_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:868]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_raise_triggered_different 
Failure:
TestMiniTestUnitTestCase#test_assert_raise_triggered_different [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:919]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_raise_triggered_different_msg 
Failure:
TestMiniTestUnitTestCase#test_assert_raise_triggered_different_msg [/tmp/_actions-runner-working-dir/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:937]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_raise_triggered_none 
Failure:
TestMiniTestUnitTestCase#test_assert_raise_triggered_none [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:949]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_raise_triggered_none_msg 
Failure:
TestMiniTestUnitTestCase#test_assert_raise_triggered_none_msg [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:961]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_raise_triggered_subclass 
Failure:
TestMiniTestUnitTestCase#test_assert_raise_triggered_subclass [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:978]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_respond_to_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_respond_to_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:986]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_same_triggered 
Failure:
TestMiniTestUnitTestCase#test_assert_same_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1003]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_send_bad 
Failure:
TestMiniTestUnitTestCase#test_assert_send_bad [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1020]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_silent_triggered_err 
Failure:
TestMiniTestUnitTestCase#test_assert_silent_triggered_err [/tmp/_actions-runner-working-dir/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1034]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_silent_triggered_out 
Failure:
TestMiniTestUnitTestCase#test_assert_silent_triggered_out [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1044]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_throws_different 
Failure:
TestMiniTestUnitTestCase#test_assert_throws_different [D:/a/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1058]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_assert_throws_unthrown 
Failure:
TestMiniTestUnitTestCase#test_assert_throws_unthrown [/tmp/_actions-runner-working-dir/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1066]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_message_lambda 
Failure:
TestMiniTestUnitTestCase#test_message_lambda [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1121]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_message_message 
Failure:
TestMiniTestUnitTestCase#test_message_message [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1115]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_prints 
Failure:
TestMiniTestUnitTestCase#test_prints [D:/a/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1144]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_empty_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_empty_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1162]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_equal_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_equal_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1172]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_includes_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_includes_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1213]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_instance_of_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_instance_of_triggered [/tmp/_actions-runner-working-dir/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1221]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_kind_of_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_kind_of_triggered [D:/a/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1231]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_match_object_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_match_object_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1257]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_match_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_match_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1264]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_nil_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_nil_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1274]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_operator_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_operator_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1301]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_predicate_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_predicate_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1284]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_respond_to_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_respond_to_triggered [/home/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1311]:
<> (UTF-8) expected but was
<> (UTF-8).
tool/test/testunit/test_minitest_unit.rb#test_refute_same_triggered 
Failure:
TestMiniTestUnitTestCase#test_refute_same_triggered [/Users/runner/work/ruby/ruby/src/tool/test/testunit/test_minitest_unit.rb:1321]:
<> (UTF-8) expected but was
<> (UTF-8).

[-> View Test suite health in main branch]

@st0012
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st0012 commented Nov 3, 2025

I think this needs to be addressed from the upstream repo instead? And then it’d be synced back here.

@zzak
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zzak commented Nov 4, 2025

Yeah, I just wanted to see if it breaks anything else in Ruby first, I need to fix the tests though

@zzak
Fix frozen string literal warnings in PP
7e759c5 
```
ruby/3.5.0+4/prettyprint.rb:184: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information)
ruby/3.5.0+4/prettyprint.rb:541: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information)
```
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@zzak @st0012