[PD-dev] [ pure-data-Bugs-1817858 ] divide by zero when scrolling patch window

[SourceForge.net]

Bugs item #1817858, was opened at 2007-10-22 12:42
Message generated for change (Comment added) made by sf-robot
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1817858&group_id=55736

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: puredata
Group: v0.40.2
>Status: Closed
Resolution: None
Priority: 5
Private: No
Submitted By: Matteo Sisti Sette (sistisette)
Assigned to: Nobody/Anonymous (nobody)
Summary: divide by zero when scrolling patch window

Initial Comment:
Hi,

Sometimes, when scrolling a big patch window full of a lot of gop-enabled abstraction instances, BY MEANS OF THE SCROLLING WHEEL OF THE MOUSE, an error message dialog pops up, titled "Application error" which says "Error: divide by zero". If I click on "details", it reads the following:

""""
divide by zero
divide by zero
    while executing
"expr -abs(0)/0"
    invoked from within
"pdtk_canvas_scroll .x9a4e60.c y [expr -abs(0)/0]"
    (command bound to event)
""""

Pd does not crash nor hang, it keeps working even while the dialog is open, and it keeps working when I close the dialog by hitting "OK".

It happens apparently at random times, but if I do a lot of scrolling up and down and up and down i'm almost sure to reproduce it within less than a minute.

It seems it does not happen when scrolling by dragging the scroll bar, only when using the mouse' scroll wheel.

And I guess it only happens with huge patches full of gui, as it had never happened to me before.

----------------------------------------------------------------------

>Comment By: SourceForge Robot (sf-robot)
Date: 2009-04-29 02:20

Message:
This Tracker item was closed automatically by the system. It was
previously set to a Pending status, and the original submitter
did not respond within 14 days (the time period specified by
the administrator of this Tracker).

----------------------------------------------------------------------

Comment By: Hans-Christoph Steiner (eighthave)
Date: 2009-04-14 04:11

Message:
is this still a problem?  I haven't seen this is a long while.

----------------------------------------------------------------------

Comment By: stffn (stffn)
Date: 2007-10-22 19:58

Message:
Logged In: YES 
user_id=1658640
Originator: NO

I had the same error some time back in Pd-extended 0.39.2 on Mac, cf. [1].
It happened all the time if i touched the track pad with two fingers while
the "two finger scroll" feature was enabled. It has disappeared in later
versions.

[1] http://lists.puredata.info/pipermail/pd-list/2006-06/039351.html

----------------------------------------------------------------------

Comment By: IOhannes m zmlnig (zmoelnig)
Date: 2007-10-22 13:23

Message:
Logged In: YES 
user_id=564396
Originator: NO

what is your OS?

does it go away if you apply the attached patch to the pd.tk?

(note the patch is really against u_main.tk; however, at runtime pd.tk  is
used, which is a mere copy of u_main.tk)
File Added: scroll_devide0.patch

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=478070&aid=1817858&group_id=55736