Client library occasionally not found

[jwimberl]

I am running a daemon process in CentOS 7, using R 3.6.0 and callr 3.7.3. The daemon listens to requests and runs a background session via callr, but occasionally this background process fails to launch, with an error

Rscript[14607]: cannot open file '/tmp/RtmpVGcFTq/callr-client--2016851.so': No such file or directory

This appears somewhat related to issue #157 , though that is marked as fixed. Is this a known issue? Is there any chance that switching to a newer version of R would help?