In my pull request I saw this failure from
I have not been able to reproduce this failure manually. When I went to tinderbox, where it ran, the WT_TEST directory did not save a copy of the failing test's directory even though the results.txt file in there indicated it would be preserved.
Telling autobuild to retest and rerunning the pull-request-tester Jenkins job passed with no changes. There is little to go on here, but in case anyone else has seen a spurious ENOENT.