abandon_page() vs mark_abandon_page()
Removed a wrong assertion. Fixes #2079.
Merge branch 'next' into sam_daniel_2108
Made catch_up_deferred_load assert page is unevictable, rather than evicted...
Fix backtraces containing r.row in JavaScript

Closes #2096
Review 1331 by @neumino
Merge branch 'next' into daniel_2087