fgcmcal fails on master with the latest conda environment on Ubuntu 18.04.4. The failure is in one of the new tests comparing the `photoCalib.getCalibrationErr()` with the `fgcmZptGrayErr`:
We are not seeing this on other machines (CentOS, macOS), so there's probably a "fun" interaction with system libraries going on here. Adding rtol=2e-7, atol=None to the above test prevents the error, but may not be the actual solution we want. This suggests to me that there's a float32 calculation going on under the hood somewhere.
I can provide an Ubuntu account to test on.