[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

> Too bad, test_resize() failed again while testing commit 
> 56e162ad5c5d3effe9b4f05d0179e1b6a2a2d9b8 :-( So this fix was not enough.

I am not sure anymore about this statement. I had a bug in my watchdog code, 
that I fixed after this failure.

I ran again the test during 3 hours and it didn't fail.

I reverted all my local changes, I rebuild Python 2.7 in debug mode to get a 
fresh python_d.exe, I removed all __pycache__, and then I ran again the test 
during 1 hour: no fail. I ran 4 instances of the test in parallel during 1 
hour: no fail.

Hum, it *seems* like the bug was fixed.

Since it's a race condition, it's not possible to say that it's really fixed. 
But my test results show that the bug is very likely to be fixed, so I close 
the bug.

I will watch AMD64 Windows8.1 Refleaks 2.7 buildbot slave next days to check if 
the bug occurs again.

--
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

> I pushed my fix for bpo-31135, no idea at this point if it fix this issue.

Too bad, test_resize() failed again while testing commit 
56e162ad5c5d3effe9b4f05d0179e1b6a2a2d9b8 :-( So this fix was not enough.

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

I interrupted 
http://buildbot.python.org/all/builders/AMD64%20Windows8.1%20Refleaks%202.7/builds/63/
 which was running since 17 hours... ("running: test_ttk_guionly (32770 sec)")

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

I pushed my fix for bpo-31135, no idea at this point if it fix this issue.

New changeset 56e162ad5c5d3effe9b4f05d0179e1b6a2a2d9b8 by Victor Stinner in 
branch '2.7':
ttk: fix LabeledScale and OptionMenu destroy() method (#3026)
https://github.com/python/cpython/commit/56e162ad5c5d3effe9b4f05d0179e1b6a2a2d9b8

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

Another hang: test_ttk\test_extensions.py:335: 
LabeledScaleTest.test2_variable_change(). Traceback:

(...)
File: "C:\haypo\2.7\lib\lib-tk\test\test_ttk\test_extensions.py", line 335, in 
test2_variable_change
  x.update()
File: "C:\haypo\2.7\lib\lib-tk\Tkinter.py", line 1023, in update
  self.tk.call('update')

I'm now using this batch script:
---
:repeat
PCbuild\amd64\python_d.exe -m test -u all --timeout=30 -R 3:3 -r 
test_ttk_guionly
if not %errorlevel% equ 0 goto :fail
echo OK
goto :repeat

:fail
echo ERR
---

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

Yesterday, I ran test_ttk_guionly during 3 hours on Windows with Python 2.7 
compiled in debug mode. I saw between 4 and 7 hangs. I'm not sure about the 
exact number since sometimes the test unblocked when I just moved my mouse or 
clicked on my Command Prompt window

At this point, I'm only sure that the following tests blocked:

* test_ttk\test_extensions.py:184: LabeledScaleTest.test_resize() -- test 
ttk.LabeledScale
* test_ttk\test_widgets.py:1367: TreeviewTest.test_heading_callback() -- test 
ttk.Treeview
* test_ttk.test_widgets.TreeviewTest.test_tag_bind() -- test ttk.Treeview

bpo-31135 fixes LabeledScale.destroy(), so it may be related.

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

The Tcl event loop is recursive: http://wiki.tcl.tk/1527

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[issue31068] [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 Refleaks 2.7

[STINNER Victor]

STINNER Victor added the comment:

Calling "self.tk.call('update')" runs the Tcl event loop:
* http://wiki.tcl.tk/1252
* https://www.tcl.tk/man/tcl/TclCmd/update.htm

Interesting but very old (2001) article: "Update considered harmful"
http://wiki.tcl.tk/1255

--
title: test_ttk_guionly hangs at self.tk.call('update') on AMD64 Windows8.1 
Refleaks 2.7 -> [2.7] test_ttk_guionly hangs at self.tk.call('update') on AMD64 
Windows8.1 Refleaks 2.7

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