pub const HAPPENS_BEFORE_VERSION: u32 = 2;Expand description
The newest schema version understood by this build. Version 2 adds
relative anchors (from), the futex_op filter and the hold budget
(max_hold_ns); version 1 files load unchanged, with their old semantics.
A build that understands only version 1 refuses a version-2 file instead of
silently dropping the fields it does not know.