At the time of writing, the issue has been fixed. However, I open (and close) this ticket to have some place to save information about it, in case it is of use later.
Recently, QuasiLocalMeasures showed its testsuites failing on 2 processes.
The problem, as it turns out, was that the output was generated not independent of the number of processes.
This is the log from the commit that now fixes the immediate problem: (https://bitbucket.org/einsteintoolkit/einsteinanalysis/commits/76e24130c79d/)
Change testsuites to use compact ASCII output and to not output information from within ghostzones. This makes the output independent from the number of processes, and allows the 2-process testsuites to succeed, even with the output generated using 1 process.
The testsuites did succeed before this change, but only on one process. They did fail on more than one, due to completely different output format then. However, the testsuite mechanism didn't pick up this failure until only lately, due to multiple factors. One was (and still is) that Cactus has issues detecting errors when values are zero, due to relative errors being non-trivial to define. Ticket #1889 is about that.
The other issue was that, while those lines were skipped, the different length of the output files was not detected until a fix for that was introduced recently, uncovering the problem here.