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Encoding.compatible? affected by call order #2312

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nirvdrum opened this issue Dec 12, 2014 · 0 comments
Closed

Encoding.compatible? affected by call order #2312

nirvdrum opened this issue Dec 12, 2014 · 0 comments
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JRuby 9.0.0.0.pre2

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@nirvdrum
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EncodingService has two lookup tables. One takes an Encoding's index and returns a RubyEncoding. This table is lazily created. A single Encoding may be used by multiple RubyEncodings. One such case is with "GB2312" and "EUC-KR". Whichever gets loaded first will occupy the spot in the table and the other will resolve to that RubyEncoding.

Examples:

$ bin/jruby -e 'p Encoding.compatible?(Encoding.find("GB2312"), Encoding.find("EUC-KR")); p Encoding.compatible?(Encoding.find("EUC-KR"), Encoding.find("GB2312"))'
#<Encoding:EUC-KR>
#<Encoding:EUC-KR>

$ bin/jruby -e 'p Encoding.compatible?(Encoding.find("EUC-KR"), Encoding.find("GB2312")); p Encoding.compatible?(Encoding.find("GB2312"), Encoding.find("EUC-KR"))'
#<Encoding:GB2312>
#<Encoding:GB2312>
@enebo enebo added this to the 9.0.0.0.pre2 milestone Apr 28, 2015
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@nirvdrum @enebo