autopkgtest fails in groovy on arm64 and armhf

[Balint Reczey]

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-groovy/groovy/armhf/r/r-cran-openmx/20200906_151809_74358@/log.gz
...
── 9. Error: probit+poisson ML+WLS (@test-discrete.R#290) ─────────────────────
Don't know how to interpret factor column 'z4' as numeric.
You may want to specify thresholds for your model like this: mxThreshold(vars='z4', nThresh=3)
Backtrace:
 1. OpenMx::mxRun(build())
 2. OpenMx:::runHelper(...)

terminate called after throwing an instance of 'std::runtime_error'
  what(): Problem in dVnames mapping
Aborted (core dumped)
...

[Balint Reczey (rbalint)]

https://github.com/OpenMx/OpenMx/issues/296

[Graham Inggs (ginggs)]

Seems to have been fixed in

r-cran-openmx (2.18.1-3) unstable; urgency=high

  * Exclude another test for i386 and skip test on armhf fully
    Closes: #971681

 -- Andreas Tille <email address hidden> Wed, 10 Feb 2021 08:38:26 +0100