Graceful teardown must own descendant processes and pending async work

Summary#

Problem#

External GitHub PRs showed shutdown bugs when wrappers, PTY layers, or destructors assumed children and pending operations would stop themselves. That led to stuck shutdowns, orphaned work, or duplicate interrupts.

Solution#

Track the real process tree or pending-operation queue, then shut down in the correct ownership order: signal the effective child, drain pending operations before subsystem teardown, and keep platform-specific paths explicit. Add regression tests that simulate wrapper processes and delayed cleanup.

Failure Modes#

Nested child processes survive after the parent exits
Duplicate SIGINT delivery causes noisy or unsafe shutdown
Destructor runs after required backend state is already gone
Global worker threads keep binaries from exiting cleanly

Sources#

https://github.com/tensorflow/tensorflow/pull/121411
https://github.com/tensorflow/tensorflow/pull/121372
https://github.com/tensorflow/tensorflow/pull/120325
https://github.com/tensorflow/tensorflow/pull/121417
https://github.com/tensorflow/tensorflow/pull/121265
https://github.com/tensorflow/tensorflow/pull/121448
https://github.com/tensorflow/tensorflow/pull/121421
https://github.com/tensorflow/tensorflow/pull/121418
https://github.com/tensorflow/tensorflow/pull/121453
https://github.com/tensorflow/tensorflow/pull/121444
https://github.com/huggingface/transformers/pull/46039
https://github.com/huggingface/transformers/pull/46698
https://github.com/huggingface/transformers/pull/46523
https://github.com/huggingface/transformers/pull/46721
https://github.com/huggingface/transformers/pull/46619
https://github.com/huggingface/transformers/pull/46587
https://github.com/huggingface/transformers/pull/46472
https://github.com/huggingface/transformers/pull/46720
https://github.com/huggingface/transformers/pull/46600
https://github.com/huggingface/transformers/pull/46690
https://github.com/huggingface/transformers/pull/46618
https://github.com/microsoft/ML-For-Beginners/pull/978
https://github.com/microsoft/ML-For-Beginners/pull/971
https://github.com/microsoft/ML-For-Beginners/pull/967
https://github.com/microsoft/ML-For-Beginners/pull/970
https://github.com/ClickHouse/ClickHouse/pull/107755
https://github.com/ClickHouse/ClickHouse/pull/107355
https://github.com/ClickHouse/ClickHouse/pull/107291
https://github.com/ClickHouse/ClickHouse/pull/107513
https://github.com/ClickHouse/ClickHouse/pull/106957
https://github.com/ClickHouse/ClickHouse/pull/100500
https://github.com/ClickHouse/ClickHouse/pull/107625
https://github.com/ClickHouse/ClickHouse/pull/107624
https://github.com/ClickHouse/ClickHouse/pull/102064
https://github.com/ClickHouse/ClickHouse/pull/105943
https://github.com/ClickHouse/ClickHouse/pull/107704
https://github.com/ClickHouse/ClickHouse/pull/107731
https://github.com/ClickHouse/ClickHouse/pull/107729
https://github.com/ClickHouse/ClickHouse/pull/102942
https://github.com/vercel/turborepo/pull/13100
https://github.com/vercel/turborepo/pull/13098
https://github.com/vercel/turborepo/pull/13095
https://github.com/vercel/turborepo/pull/13094
https://github.com/vercel/turborepo/pull/13093
https://github.com/vercel/turborepo/pull/13092
https://github.com/vercel/turborepo/pull/13090
https://github.com/vercel/turborepo/pull/13089
https://github.com/vercel/turborepo/pull/13088
https://github.com/vercel/turborepo/pull/13086
https://github.com/vercel/turborepo/pull/13085
https://github.com/vercel/turborepo/pull/13084
https://github.com/vercel/turborepo/pull/13079
https://github.com/vercel/turborepo/pull/13077
https://github.com/vercel/turborepo/pull/13074
mined_at: 2026-06-17T16:08:52Z

Sagwan Revalidation 2026-06-17T16:14:18Z#

verdict: ok
note: 프로세스 트리와 pending 작업을 명시적으로 정리하라는 권장은 여전히 유효함

Sagwan Revalidation 2026-06-18T17:00:56Z#

verdict: ok
note: 전날 검증 이후 일반 원칙·권장안·출처 모두 재사용 가능해 보임