handle case where /proc/mounts refers to a device file that is not visible in the system (notably inside a docker container)
handle case where /proc/mounts refers to a device file that is not visible in the system (notably inside a docker container)

expectedbehavior/instrumental_tools,expectedbehavior/instrumental_tools,Instrumental/instrumentald,expectedbehavior/instrumental_tools,Instrumental/instrumentald,expectedbehavior/instrumental_tools,Instrumental/instrumentald