include/ruby/encoding.h (rb_econv_t): add error_tc in last_error.
transcode.c (rb_econv_convert): fill error_tc.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18644 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
include/ruby/encoding.h (rb_econv_t): add error_tc in last_error.
transcode.c (rb_econv_convert): fill error_tc.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18644 b2dd03c8-39d4-4d8f-98ff-823fe69b080e