Invalid argument errors with libnetcdf 4.5.0 but not 4.4.1

[spencerahill]

(Not sure if this is best filed in this repo or https://github.com/Unidata/netcdf-c)

Our CI test suite has recently yielded errors from netCDF4, and @spencerkclark has pinpointed libnetcdf 4.5.0 as the key player. The errors don't occur with e.g. 4.4.1. See the three comments starting with spencerahill/aospy#232 (comment) for more.

[dopplershift]

If you can reproduce the problem with just ncdump, it's probably best to open an issue on netcdf-c; be sure to include the file to reproduce (or a public link).