Checkpoint.  We probably need some restrictions on the trees in a tree sequence in the preconditions of [tree_update_fblock_d_ok] to prove properties about them after a direct write.
Checkpoint.  We probably need some restrictions on the trees
in a tree sequence in the preconditions of [tree_update_fblock_d_ok]
to prove properties about them after a direct write.

mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl,mit-pdos/fscq-impl