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Title: gh-146194: Fix nested KeyboardInterrupt handling in asyncio by okiemute04 · Pull Request #146203 · python/cpython · GitHub

Open Graph Title: gh-146194: Fix nested KeyboardInterrupt handling in asyncio by okiemute04 · Pull Request #146203 · python/cpython

X Title: gh-146194: Fix nested KeyboardInterrupt handling in asyncio by okiemute04 · Pull Request #146203 · python/cpython

Description: Fixes #146194 Problem When multiple Ctrl+C presses occurred in nested asyncio tasks, the third press would cause a crash with "Task was destroyed but it is pending!" instead of gracefully cancelling the nested tasks. Solution Modified _on_sigint in Lib/asyncio/runners.py to cancel the main task on every SIGINT, allowing nested cancellations to propagate correctly through multiple levels. Testing Added test_nested_keyboardinterrupt_handling to test_runners.py Verified that multiple cancellations work correctly without crashes All existing runner tests pass Issue: gh-146194

Open Graph Description: Fixes #146194 Problem When multiple Ctrl+C presses occurred in nested asyncio tasks, the third press would cause a crash with "Task was destroyed but it is pending!" instead of gracefully...

X Description: Fixes #146194 Problem When multiple Ctrl+C presses occurred in nested asyncio tasks, the third press would cause a crash with "Task was destroyed but it is pending!" instead of gr...

Opengraph URL: https://github.com/python/cpython/pull/146203

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2976259 gh-146194: Fix nested KeyboardInterrupt handling in asyncio okiemute04 Mar 20, 2026 https://github.com/python/cpython/pull/146203/commits/29762599412bf696f9a8cf3df7b626a97724ac7f
5982498 gh-146194: Fix nested KeyboardInterrupt handling in asyncio okiemute04 Mar 20, 2026 https://github.com/python/cpython/pull/146203/commits/598249886ff028774df29fe77cf42b168d0a14f4
2563ac4 Trigger docs rebuild okiemute04 Mar 20, 2026 https://github.com/python/cpython/pull/146203/commits/2563ac4b5eb7187ea2e41b7da29d0a2207efbad7
099cf04 Fix NEWS file formatting - remove duplicate metadata okiemute04 Mar 20, 2026 https://github.com/python/cpython/pull/146203/commits/099cf041256f4b1e4db459c8341c970844a4ec84
034c9af Add NEWS entry for asyncio nested KeyboardInterrupt fix okiemute04 Mar 20, 2026 https://github.com/python/cpython/pull/146203/commits/034c9af1734dcc49255cf018696ee36fc10ce61d
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