In my latest builds against OSX using RVM 2.5.1/2.5.5 I get this same error:
Libraries missing for ruby-2.5.1: /usr/local/opt/gdbm/lib/libgdbm.5.dylib,/usr/local/opt/readline/lib/libreadline.7.dylib. Refer to your system manual for installing libraries
Mounting remote ruby failed with status 10, stopping installation.
Gemset '' does not exist, 'rvm ruby-2.5.1 do rvm gemset create ' first, or append '--create'.
The command "rvm use 2.5.1 --install --binary --fuzzy" failed and exited with 2 during .
And for 2.5.5
:
Libraries missing for ruby-2.5.5: /usr/local/opt/readline/lib/libreadline.7.dylib. Refer to your system manual for installing libraries
Mounting remote ruby failed with status 10, stopping installation.
Gemset '' does not exist, 'rvm ruby-2.5.5 do rvm gemset create ' first, or append '--create'.
The command "rvm use 2.5.5 --install --binary --fuzzy" failed and exited with 2 during .
The build is therefore failing before it ever gets to the steps for running any specific code.