lancedb-gatefixer[bot] 75e71176cb fix(python): prevent BlobFile finalizer panics on Tokio workers (#4291) ...

## Cause

`io.RawIOBase.__del__` checks `closed` and calls `close()` during GC.
Both PyO3 methods entered `block_on`, which panics when GC runs on a
LanceDB Tokio worker.

## Fix

Track Python blob handle closure atomically so `closed` is synchronous.
`close()` marks the handle closed immediately and, when called on a
Tokio thread, schedules the underlying async cleanup without blocking
that thread. Reads and seeks after close fail immediately; ordinary
callers still wait for cleanup.

## Validation

- Rebuilt the Python extension with `uv run --extra tests --extra dev
maturin develop --extras tests,dev`.
- Ran the blob test file and remote blob handle test: 69 passed, 1
skipped.
- Ran `cargo fmt --all`, `ruff format .`, and `ruff check .`.

Fixes #4283

<!-- lance-gatekeeper-fix:v1 agent=15a7bd545e63dea4b69faa0429f0a684
generation=1 -->

Co-authored-by: Gatefixer <313497061+lancedb-gatefixer[bot]@users.noreply.github.com>

2026-09-23 14:24:04 -07:00

..

table

chore: update lance dependency to v6.0.0-beta.7 (#3334)

2026-04-29 10:52:25 -07:00

arrow.rs

feat(python): make Permutation fork-safe for PyTorch DataLoader workers (#3339)

2026-05-05 13:44:10 -07:00

catalog.rs

feat: add remote catalogs and Python and TypeScript bindings (#4195)

2026-09-17 01:51:10 +08:00

connection.rs

feat: add view CRUD APIs (#4236)

2026-09-23 15:09:40 +08:00

error.rs

feat: add remote catalogs and Python and TypeScript bindings (#4195)

2026-09-17 01:51:10 +08:00

expr.rs

feat(python): accept expressions in update filters (#3876)

2026-08-27 20:28:21 +08:00

header.rs

chore: update lance dependency to v6.0.0-beta.7 (#3334)

2026-04-29 10:52:25 -07:00

index.rs

feat: expose list-element FTS document granularity (#4050)

2026-08-26 23:27:39 +08:00

job.rs

fix(python): resolve native job types in API docs (#4170)

2026-09-14 15:09:29 +08:00

lib.rs

feat: list a table's per-row Function errors from the client (#4208)

2026-09-17 05:12:50 -07:00

namespace.rs

chore: update lance dependency to v6.0.0-beta.7 (#3334)

2026-04-29 10:52:25 -07:00

oauth.rs

feat: use oauth2 crate for OAuth with configurable client auth (#4181)

2026-09-16 20:11:08 +08:00

otel.rs

feat: expose Lance metrics via OpenTelemetry in Python and Node (#3609)

2026-07-09 15:36:03 -07:00

permutation.rs

feat: support remote tables in the data loader (#3981)

2026-08-21 13:45:39 -07:00

query.rs

ci: add spell checking (#4148)

2026-09-09 15:33:04 +08:00

runtime.rs

fix(python): prevent BlobFile finalizer panics on Tokio workers (#4291)

2026-09-23 14:24:04 -07:00

session.rs

fix(python): set native module metadata (#3913)

2026-08-10 21:40:31 +08:00

sql.rs

feat: add asynchronous remote SQL queries (#4070)

2026-09-03 14:59:14 -07:00

table.rs

fix(python): prevent BlobFile finalizer panics on Tokio workers (#4291)

2026-09-23 14:24:04 -07:00

util.rs

chore: migrate Rust crates to edition 2024 and fix clippy warnings (#3098)

2026-03-03 16:23:29 -08:00