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[3.15] gh-74112: Make Ctrl-C in the IDLE Shell interrupt blocking calls (GH-157662) #158917

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Merged
terryjreedy merged 3 commits into from
Oct 9, 2026
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[3.15] gh-74112: Make Ctrl-C in the IDLE Shell interrupt blocking calls (GH-157662) #158917

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a089060
gh-74112: Make Ctrl-C in the IDLE Shell interrupt blocking calls (GH-…
serhiy-storchaka Sep 23, 2026
c73527f
gh-74112: Fix race in test_interrupt_blocking_call (GH-158914)
christianaurichzm Oct 6, 2026
4604f31
Merge branch '3.15' into backport-9232c21-3.15
terryjreedy Oct 9, 2026
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gh-74112: Fix race in test_interrupt_blocking_call (GH-158914) 
On a loaded machine the KeyboardInterrupt could be raised before the main
thread reached time.sleep(), escape the test and stop the whole regrtest run.

(cherry picked from commit ea0ee92)
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@christianaurichzm @serhiy-storchaka
christianaurichzm authored and serhiy-storchaka committed Oct 6, 2026
commit c73527f7eac89d5189dc805750cbc4bc5d28a885
4 changes: 3 additions & 1 deletion Lib/idlelib/idle_test/test_run.py
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Expand Up @@ -540,9 +540,11 @@ def test_interrupt_blocking_call(self):
# gh-74112: interrupt the main thread blocked in time.sleep().
timer = threading.Timer(0.1, self.ex.interrupt_the_server)
self.addCleanup(timer.join)
timer.start()
start = time.monotonic()
with self.assertRaises(KeyboardInterrupt):
# On a loaded machine the signal can arrive before the main
# thread reaches time.sleep(), so start the timer in the block.
timer.start()
time.sleep(support.SHORT_TIMEOUT)
self.assertLess(time.monotonic() - start, support.SHORT_TIMEOUT / 2)

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