Issue #1903 has been updated by Mark Moseley.


This is actually broader than I described. It occurs whenever:

  iseq->insn_info_size > 0
and
  iseq->insn_info_table[0].position = cfp->pc - cfp->iseq->iseq_encoded

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http://redmine.ruby-lang.org/issues/show/1903

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http://redmine.ruby-lang.org