segmentation fault on pmw dialog activate

[Iakov Davydov]

Pmw.Dialog segfaults on activate() method.

Example from /usr/share/doc/python-pmw-doc/examples/Dialog.py (python-pmw-doc package) causes segfault.

This seems to be tkinter problem because segfault actually happens on:

/usr/lib/python2.5/site-packages/Pmw/Pmw_1_3/lib/PmwBlt.py(57)busy_hold()
-> window.tk.call(_busyCommand, 'hold', window._w)

[Iakov Davydov (iakov-davydov)]

This bug also affects pymol:
Help->About causes segmentation fault.

/usr/share/python-support/pymol/pmg_tk/skins/normal/__init__.py

[Lupine (thelupine)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in python-pmw.

For future reference you might be interested to know that a lot of applications have bug reporting functionality built in to them. This can be accessed via the Report a Problem option in the Help menu for the application with which you are having an issue. You can learn more about this feature at https://wiki.ubuntu.com/ReportingBugs.

Also, I've been unable to reproduce your issue on Ubuntu 8.10. Can you reproduce this issue with an Ubuntu LIVE CD and report back if the problem still exists on Ubuntu 8.10 LIVE CD? What were the exact step you followed to reproduce this issue?

[Don (dldietmeyer)]

I have run into the same segfault when activating a Pmw.Dialog, and am still looking for a fix or workaround. Using show() is not a replacement for activate().

[Martin Lutz (m-lutz)]

I assume that this bug is related to Debian-bug 524149.

[Don (dldietmeyer)]

Martin, Sorry, I don't know a thing about the Debian bug.
The problem I had is documented in the Ubuntu Forum in
a thread entitled "Segfault in Pmw.dialog."
   Don

Martin Lutz wrote:
> I assume that this bug is related to Debian-bug 524149.
>
>

--

Donald L. Dietmeyer
   2211 Waunona Way
   Madison, WI 53713-1619
   [phone]
  <email address hidden>

[Martin Lutz (m-lutz)]

Dear Don,

pmw calls blt, which causes the segfault. (pymol calls pmw, which calls blt,
which calls tk...)

It only occurs with version blt_2.4z-4.1. There is no problem with the old
version blt_2.4z-4. The bug causing the segfault must have been introduced in
the latest version.

If you downgrade to the old version of blt, your segfault will disappear. (Of
course downgrading is not exactly a solution...)

Best wishes,
Martin

Don wrote:
> Martin, Sorry, I don't know a thing about the Debian bug.
> The problem I had is documented in the Ubuntu Forum in
> a thread entitled "Segfault in Pmw.dialog."
> Don
>
> Martin Lutz wrote:
>> I assume that this bug is related to Debian-bug 524149.
>>
>>
>
> --
>
> Donald L. Dietmeyer
> 2211 Waunona Way
> Madison, WI 53713-1619
> [phone]
> <email address hidden>
>

[Gene Hilton (genehilton)]

I am not sure it's this simple. I tried following the suggestion to
downgrade to intrepids blt. This downgrading fixes the dialog activate bug
- I tried it, but does not fix the BLT bugs. A simpler test case that
segfaults is

import Pmw
a=Pmw.Blt.Vector(1)

I think there is more going on here.

On Mon, Jun 8, 2009 at 3:51 AM, Bug Watch Updater <
<email address hidden>> wrote:

> ** Changed in: blt (Debian)
> Status: Unknown => New
>
> --
> segmentation fault on pmw dialog activate
> https://bugs.launchpad.net/bugs/305211
> You received this bug notification because you are a direct subscriber
> of a duplicate bug.
>
> Status in “python-pmw” source package in Ubuntu: Incomplete
> Status in “blt” source package in Debian: New
>
> Bug description:
> Pmw.Dialog segfaults on activate() method.
>
> Example from /usr/share/doc/python-pmw-doc/examples/Dialog.py
> (python-pmw-doc package) causes segfault.
>
> This seems to be tkinter problem because segfault actually happens on:
>
> /usr/lib/python2.5/site-packages/Pmw/Pmw_1_3/lib/PmwBlt.py(57)busy_hold()
> -> window.tk.call(_busyCommand, 'hold', window._w)
>

[viyyer (viyyer)]

Any updates on this. I have the same problems.

[nanotube (nanotube)]

I'm Running intrepid,
running pmw's Dialog_test still causes a segfault.

[Gene Hilton (genehilton)]

I found a fix that works for me. The patch in https://bugs.launchpad.net/ubuntu/+source/blt/+bug/359857 fixes /usr/lib/blt2.4/pkgIndex.tc so that BLT knows about Tck/Tk 8.5 (which python tk is linked against). Now both the dialog test reported here and the BLT plotting troubles reported in https://bugs.launchpad.net/ubuntu/+source/python-pmw/+bug/305211 .