fix(borrow): Attempt at fixing #2 (BorrowError in DBImpl). It looks like maybe_do_compaction() was called with the current version being borrowed, and VersionSet::needs_compaction() attempts to re-borrow the current version.

syntax: glob

*.bk
*.orig
*.swp
Cargo.lock
kcov-out
target

# LevelDB test instances
LOG{,.old}
LOCK
CURRENT
*.ldb
*.log
MANIFEST-*