Martin Vogel fea266fc53 fix(gbuf): canonical collision winner honors the upsert refresh contract ...

The deterministic same-QN collision rule picked the lexicographically
smallest (label, file_path, start_line, name), which silently inverted
the documented upsert/merge semantics: re-upserting a QN with updated
fields kept the OLD content (gbuf_upsert_updates,
gbuf_upsert_same_qn_updates_all_fields, gbuf_merge_overlapping_qns all
red on every platform).

Replace it with a single mixed-direction total order applied in both
cbm_gbuf_upsert_node and merge_update_existing: smallest file_path,
then LARGEST start_line, then largest name/label. Still a pure content
function of the two candidates (commutative, associative,
scheduling-independent — multi-threaded runs stay byte-identical,
verified by the xfs MT x4 fingerprint guard), and line-descending
within a file restores the classic contract: a later definition in the
same file replaces the earlier one, and a full tie is the same entity
refreshed in place.

Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>

2026-07-07 00:58:05 +02:00

..

graph_buffer.c

fix(gbuf): canonical collision winner honors the upsert refresh contract

2026-07-07 00:58:05 +02:00

graph_buffer.h

perf(gbuf): release indexes before dump transients; dense by_id; drop dead field

2026-07-06 21:07:49 +02:00