** Summary changed:
- Backport request: http://bugs.python.org/issue14308
+ _DummyThread' object has no attribute '_Thread__block
** Changed in: python2.7 (Ubuntu Precise)
Importance: Undecided => Medium
** Changed in: python2.7 (Ubuntu Precise)
Milestone: None => ubuntu-12.04.3
** Description changed:
- Resolved Upstream Issue: http://bugs.python.org/issue14308
+ [Impact]
- Based on my experimentation with the test script included in that ticket
- the threads throw the exceptions when the context switch back to the
- thread happens, not on cleanup of the thread (throw a print and
- sys.stdout.flush() on either side of the sleep to demonstrate this),
- which means this could have a drastic effect on programs which use both
- threads and os.fork() (through, say, subprocess.Popen).
+ Based on the test script available at the upstream issue link, the
+ exception is thrown in programs that use threads and os.fork() (like
+ could be the case with subprocess).
+
+ As reported upstream, the exception when a "dummy" thread is in the
+ threading module's active list after a fork().
+
+ [Test Case]
+
+ Run the following program, available in the upstream issue:
+
+ http://bugs.python.org/file25511/bad-thread.py
+
+ to reproduce the problem.
+
+ [Regression Potential]
+
+ None seen at the moment.
+ Upstream patch contains also a test case to address this issue:
+
+ http://hg.python.org/cpython/rev/ab9d6c4907e7
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https://bugs.launchpad.net/bugs/1077153
Title:
_DummyThread' object has no attribute '_Thread__block
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