[fix] IO#reopen: copy encoding from source IO#9339
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After reopen, the IO retained its old encoding settings instead of inheriting the source's external/internal encoding. CRuby's io_reopen explicitly copies fptr->encs = orig->encs right after the mode assignment.
headius
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Mar 28, 2026
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Yup makes sense. Test probably could move to ruby/spec.
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After reopen, the IO retained its old encoding settings instead of inheriting the source's external/internal encoding.
CRuby's io_reopen explicitly copies fptr->encs = orig->encs right after the mode assignment.