linode:fedora-25-64 .../tests/main/snap-on-non-shared-root# SNAP_CONFINE_DEBUG=1 test-snapd-tools.echo hello
DEBUG: security tag: snap.test-snapd-tools.echo
DEBUG: executable:   /usr/lib/snapd/snap-exec
DEBUG: confinement:  non-classic
DEBUG: preparing seccomp profile associated with security tag snap.test-snapd-tools.echo
DEBUG: host arch (kernel) is '-1073741762'
DEBUG: native arch (userspace) is '-1073741762'
DEBUG: adding compat arch '1073741827'
DEBUG: checking if the current process shares mount namespace with the init process
DEBUG: re-associating is not required
DEBUG: creating lock directory /run/snapd/lock (if missing)
DEBUG: opening lock directory /run/snapd/lock
DEBUG: opening lock file: /run/snapd/lock/.lock
DEBUG: sanity timeout initialized and set for three seconds
DEBUG: acquiring exclusive lock (scope (global))
DEBUG: sanity timeout reset and disabled
DEBUG: ensuring that snap mount directory is shared
DEBUG: performing operation: (disabled) use debug build to see details
cannot perform operation: (disabled) use debug build to see details: No such file or directory