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JSON::Parser issues with encodings #4281

headius opened this Issue Nov 14, 2016 · 2 comments


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headius commented Nov 14, 2016


JRuby master running updated Ruby 2.3.x tests.

Expected Behavior

The following tests were added with a large update of json tests:

  def test_argument_encoding
    source = "{}".force_encoding("ascii-8bit")
    assert_equal Encoding::ASCII_8BIT, source.encoding
  end if defined?(Encoding::ASCII_8BIT)

  def test_error_message_encoding
    bug10705 = '[ruby-core:67386] [Bug #10705]'
    json = "\"\xE2\x88\x9A\"".force_encoding(Encoding::UTF_8)
    e = assert_raise(JSON::ParserError) {
    assert_equal(Encoding::UTF_8, e.message.encoding, bug10705)
    assert_include(e.message, json, bug10705)
  end if defined?(Encoding::UTF_8)

Actual Behavior

They fail. In the first case, the encoding of the source appears to change to UTF-8. The second does not raise an error for improperly-encoded content.

  5) Failure:
TestJSON#test_argument_encoding [/Users/headius/projects/jruby/test/mri/json/test_json.rb:552]:
<#<Encoding:ASCII-8BIT>> expected but was

  6) Failure:
TestJSON#test_error_message_encoding [/Users/headius/projects/jruby/test/mri/json/test_json.rb:558]:
JSON::ParserError expected but nothing was raised.

@headius headius added this to the JRuby milestone Nov 14, 2016

@headius headius changed the title JSON::Parser does not preserve binary encoding JSON::Parser issues with encodings Nov 14, 2016

@headius headius modified the milestones: JRuby, JRuby Dec 13, 2016


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headius commented Dec 13, 2016

Copy @flori since he still maintains the json library.

@headius headius modified the milestones: JRuby, JRuby May 15, 2018


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headius commented May 15, 2018

Updated json gem + tests no longer has this issue.

@headius headius closed this May 15, 2018

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