markSomeCapabilities(mark_root, gct, gct->thread_index, n_gc_threads,
rtsTrue/*prune sparks*/);
scavenge_capability_mut_lists(&capabilities[gct->thread_index]);
markSomeCapabilities(mark_root, gct, gct->thread_index, n_gc_threads,
rtsTrue/*prune sparks*/);
scavenge_capability_mut_lists(&capabilities[gct->thread_index]);