Not sure if this is the right place to report or not. Originally reported in http://bugs.ruby-lang.org/issues/6745 but Yui Naruse determined was a bug in pg_ext:
"It crashes on pgresult_values(), so it seems pg_ext's bug.
6 pg_ext.bundle 0x0000000109dd6578 pgresult_values + 200 (pg_result.c:735)
Could you report this to pg_ext?"
See the following for dump files, logs: http://bugs.ruby-lang.org/issues/6745
Please let me know if I should post this elsewhere.