[DRE-maint] Bug#996305: ruby-json: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed: NoMethodError: undefined method `assert_separately'

[Antonio Terceiro]

Source: ruby-json
Version: 2.5.1+dfsg-1
Severity: serious
Justification: FTBFS
Tags: bookworm sid ftbfs
User: debian-ruby at lists.debian.org
Usertags: ruby3.0

Hi,

We are about to enable building against ruby3.0 on unstable. During a test
rebuild, ruby-json was found to fail to build in that situation.

To reproduce this locally, you need to install ruby-all-dev from experimental
on an unstable system or build chroot.

Relevant part (hopefully):
>   Did you mean?  assert_empty>, @method_name="test_generate">], @stop_tag=#<Object:0x000055bf83e6b750>, @failures=[], @errors=[#<Test::Unit::Error:0x000055bf838480a8 @test_name="test_generate(JSONInRactorTest)", @exception=#<NoMethodError: undefined method `assert_separately' for #<JSONInRactorTest:0x000055bf83dee390 ...>
>   Did you mean?  assert_empty>, @method_name="test_generate">], @pendings=[], @omissions=[], @notifications=[], @channels={"Test::Unit::TestResult::FINISHED"=>{#<Test::Unit::Util::ProcWrapper:0x000055bf83e6b570 @a_proc=#<Proc:0x000055bf83e6b598 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:88>, @hash=94281040049560>=>#<Proc:0x000055bf83e6b598 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:88>}, "Test::Unit::TestResult::CHANGED"=>{#<Test::Unit::Util::ProcWrapper:0x000055bf83e6b0e8 @a_proc=#<Proc:0x000055bf83e6b110 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:91>, @hash=94281040048400>=>#<Proc:0x000055bf83e6b110 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:91>}, "Test::Unit::TestResult::PASS_ASSERTION"=>{#<Test::Unit::Util::ProcWrapper:0x000055bf83e6acd8 @a_proc=#<Proc:0x000055bf83e6ad00 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:94>, @hash=94281040047360>=>#<Proc:0x000055bf83e6ad00 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:94>}, "Test::Unit::TestResult::FAULT"=>{#<Test::Unit::Util::ProcWrapper:0x000055bf83e6a8c8 @a_proc=#<Proc:0x000055bf83e6a8f0 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:97>, @hash=94281040046320>=>#<Proc:0x000055bf83e6a8f0 /usr/share/rubygems-integration/all/gems/test-unit-3.3.9/lib/test/unit/ui/testrunnermediator.rb:97>}}>>
>   Did you mean?  assert_empty
> /<<PKGBUILDDIR>>/tests/ractor_test.rb:8:in `test_generate'
>       5: 
>       6: class JSONInRactorTest < Test::Unit::TestCase
>       7:   def test_generate
>   =>  8:     assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}")
>       9:     begin;
>      10:       $VERBOSE = nil
>      11:       require "json"
> ===============================================================================
> : (0.042820)
> JSONParserTest: 
>   test_argument_encoding:				.: (0.000209)
>   test_backslash:					.: (0.000121)
>   test_construction:					.: (0.000078)
>   test_error_message_encoding:				.: (0.000158)
>   test_freeze:						.: (0.000218)
>   test_generate_core_subclasses_with_default_to_json:	.: (0.000145)
>   test_generate_core_subclasses_with_new_to_json:	.: (0.000242)
>   test_generate_of_core_subclasses:			.: (0.000123)
>   test_nesting:						.: (0.000632)
>   test_parse_array_custom_array_derived_class:		.: (0.000104)
>   test_parse_array_custom_non_array_derived_class:	.: (0.000105)
>   test_parse_arrays:					.: (0.000156)
>   test_parse_big_integers:				.: (0.000178)
>   test_parse_bigdecimals:				.: (0.000125)
>   test_parse_comments:					.: (0.000163)
>   test_parse_complex_objects:				.: (0.019595)
>   test_parse_generic_object:				.: (0.000173)
>   test_parse_json_primitive_values:			.: (0.000492)
>   test_parse_more_complex_arrays:			.: (0.012031)
>   test_parse_numbers:					.: (0.000589)
>   test_parse_object:					.: (0.000103)
>   test_parse_object_custom_hash_derived_class:		.: (0.000108)
>   test_parse_object_custom_non_hash_derived_class:	.: (0.000154)
>   test_parse_simple_arrays:				.: (0.000364)
>   test_parse_simple_objects:				.: (0.000253)
>   test_parse_some_strings:				.: (0.000102)
>   test_parse_values:					.: (0.000173)
>   test_parser_reset:					.: (0.000082)
>   test_parsing:						.: (0.000070)
>   test_parsing_frozen_ascii8bit_string:			.: (0.000081)
>   test_some_wrong_inputs:				.: (0.000475)
>   test_symbolize_names:					.: (0.000127)
> JSONStringMatchingTest: 
>   test_match_date:					.: (0.000540)
> 
> Finished in 0.138216227 seconds.
> -------------------------------------------------------------------------------
> 103 tests, 2057 assertions, 0 failures, 1 errors, 0 pendings, 0 omissions, 0 notifications
> 99.0291% passed
> -------------------------------------------------------------------------------
> 745.21 tests/s, 14882.48 assertions/s
> rake aborted!
> Command failed with status (1): [ruby -w -I"tests" /usr/lib/ruby/gems/3.0.0/gems/rake-13.0.3/lib/rake/rake_test_loader.rb "tests/json_addition_test.rb" "tests/json_common_interface_test.rb" "tests/json_encoding_test.rb" "tests/json_ext_parser_test.rb" "tests/json_fixtures_test.rb" "tests/json_generator_test.rb" "tests/json_generic_object_test.rb" "tests/json_parser_test.rb" "tests/json_string_matching_test.rb" "tests/ractor_test.rb" "tests/test_helper.rb" -v]
> 
> Tasks: TOP => default
> (See full trace by running task with --trace)
> ERROR: Test "ruby3.0" failed: 


The full build log is available at
https://people.debian.org/~kanashiro/ruby3.0/round2/builds/3/ruby-json/ruby-json_2.5.1+dfsg-1+rebuild1633384536_amd64.build.txt
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