When running in an environment with legacy cgroups, the cgroups-related parts of outer_helper_spawn aren't applicable. When a user invokes bst with --try-limit, the code needs to fail softly, as if no limit had been specified at all. We handle other cases of this earlier on the code, but we may (apparently) reach as far as burning the child pid into cgroup.procs before legacy cgroups balks, so we add another soft-failure for that case here.
When running in an environment with legacy cgroups, the cgroups-related parts of
outer_helper_spawnaren't applicable. When a user invokes bst with--try-limit, the code needs to fail softly, as if no limit had been specified at all. We handle other cases of this earlier on the code, but we may (apparently) reach as far as burning the child pid intocgroup.procsbefore legacy cgroups balks, so we add another soft-failure for that case here.