---
model: claude-opus-4-8
service: claude
timestamp: 2026-07-02T22:25:44Z
git_ref: 9201a2ed
diff_cmd: git diff 9201a2ed..drop_ria_nursery
---

# Raw AI output (diff-ref mode)

Step-B2 code lives on `drop_ria_nursery` after `9201a2ed`; per
diff-ref mode the verbatim content is reachable via the pointer
below.

## Generated files

> `git diff 9201a2ed..drop_ria_nursery -- tractor/runtime/_supervise.py`

`_open_and_supervise_one_cancels_all_nursery`:
- removed the outer `try:` wrapper and the
  `except (Exception, BaseExceptionGroup, trio.Cancelled) as
  _outer_err:` safety-net handler.
- the former inner `except BaseException` is now THE handler,
  renamed local `_inner_err` -> `_scope_err`, de-indented one
  level; it sets `an._scope_error`, records `errors[uid]`,
  waits on the debugger, `_join_procs.set()`, then a shielded
  classify/log + snapshot-ria + `an.cancel()` + 0.5s-bounded
  `_reap_ria_portals()`. No re-raise (the `finally` raises
  from `errors`).
- `finally` block unchanged.
- dropped the `outer_err`/`inner_err` local decls at fn top.

(The diff is large — ~119+/149- — because de-indenting the
handler body one level rewrites every line in the block; the
logic delta is just "two handlers -> one".)

## Test runs (verbatim)

```
baseline (pre-B2, step-B tip 9201a2ed), full suite
(dynamic_pub_sub deselected):
1 failed, 300 passed, 9 skipped, 2 deselected, 1 xfailed,
2 xpassed in 1499.49s
  -> the 1 failure = test_ext_types_over_ipc[...] trio.TooSlowError
     (load-induced; passes 6/6 in isolation in 4.89s)

B2 error/cancel gate:
tests/test_cancellation test_remote_exc_relay
test_inter_peer_cancellation test_advanced_faults
test_oob_cancellation test_to_actor test_spawning test_local
test_rpc
-> 71 passed, 1 xfailed in 125.26s

B2 full-suite run: see b2_full.log
```
