It's possible to segfault in __rec_append_orig_value in non diagnostic builds on line 129 of rec_visibility.c here. This would require the expected on disk value unpack to be NULL or its associated time window.

    if (WT_TIME_WINDOW_HAS_STOP(&unpack->tw)) {
        tombstone_globally_visible = __wt_txn_tw_stop_visible_all(session, &unpack->tw);

Given that this happened on 4.4.14 the code has changed significantly including the addition of a WT_ASSERT_ALWAYS prior which checks that the unpack isn't NULL.

This ticket is intended to track this failure mode as I couldn't find existing or resolved WT issue that show this or a similar failure mode.