R devel - May 2003 - R crashes when resizing windows (PR#2992)

Full_Name: Gavin Alexander
Version: 1.7.0
OS: Win2000
Submission from: (NULL) (130.209.6.40)


When I resize the R-GUI console window by dragging an edge and drag for more
than a second or two, R crashes. The program exits, leaving a pop-up
"Program
Error" box with the message:
"Rgui.exe has generated errors and will be closed by Windows.
 You will need to restart the program.
 An Error log is being created.".

I now avoid having to resize the console window by setting the default size in
GUI preferences. However, R still crashes when resizing help windows, which
don't have a user-settable default size.

I am using R version 1.7.0, but can replicate this problem in the only other
versions I have used: 1.4.1 and 1.6.2, in both MDI and SDI mode, all in
Win2000.

Gavin Alexander

gavin@stats.gla.ac.uk wrote:
> Full_Name: Gavin Alexander
> Version: 1.7.0
> OS: Win2000
> Submission from: (NULL) (130.209.6.40)
> 
> 
> When I resize the R-GUI console window by dragging an edge and drag for
more
> than a second or two, R crashes. The program exits, leaving a pop-up
"Program
> Error" box with the message:
> "Rgui.exe has generated errors and will be closed by Windows.
>  You will need to restart the program.
>  An Error log is being created.".
> 
> I now avoid having to resize the console window by setting the default size
in
> GUI preferences. However, R still crashes when resizing help windows, which
> don't have a user-settable default size.
> 
> I am using R version 1.7.0, but can replicate this problem in the only
other
> versions I have used: 1.4.1 and 1.6.2, in both MDI and SDI mode, all in
> Win2000.
> 
> Gavin Alexander
This is the same as PR#1711.
But thanks anyway, since you provide an interesting information:
It's easy to reproduce this crash now by continously (slowly) dragging a 
couple of seconds, at least on my machine (WinNT4.0).

Anyway, this one is hard to fix.
Please read the thread for PR#1711 for more information, particularly 
the message

  From: Duncan Murdoch <murdoch@stats.uwo.ca>
  To: ripley@stats.ox.ac.uk
  Cc: <socrates@mail.ru>, <R-bugs@biostat.ku.dk>
  Subject: Re: GUI bug (PR#1711)
  Date: Thu, 27 Jun 2002 10:15:01 -0400


Uwe Ligges

This is PR#1711 !

On Tue, 13 May 2003 gavin@stats.gla.ac.uk wrote:
> Full_Name: Gavin Alexander
> Version: 1.7.0
> OS: Win2000
> Submission from: (NULL) (130.209.6.40)
> 
> 
> When I resize the R-GUI console window by dragging an edge and drag for
more
> than a second or two, R crashes. The program exits, leaving a pop-up
"Program
> Error" box with the message:
> "Rgui.exe has generated errors and will be closed by Windows.
>  You will need to restart the program.
>  An Error log is being created.".
> 
> I now avoid having to resize the console window by setting the default size
in
> GUI preferences. However, R still crashes when resizing help windows, which
> don't have a user-settable default size.
They do: look in the Rconsole file or Edit | Preferences.  (Hint: a `help 
window' is actually a pager window.)
> I am using R version 1.7.0, but can replicate this problem in the only
other
> versions I have used: 1.4.1 and 1.6.2, in both MDI and SDI mode, all in
> Win2000.
Could you send us a patch please?  *We* find is very hard to re-create.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

On Tue, 13 May 2003 13:47:23 +0200 (MET DST), you wrote:
>Full_Name: Gavin Alexander
>Version: 1.7.0
>OS: Win2000
>Submission from: (NULL) (130.209.6.40)
>
>
>When I resize the R-GUI console window by dragging an edge and drag for more
>than a second or two, R crashes. The program exits, leaving a pop-up
"Program
>Error" box with the message:
>"Rgui.exe has generated errors and will be closed by Windows.
> You will need to restart the program.
> An Error log is being created.".
>
>I now avoid having to resize the console window by setting the default size
in
>GUI preferences. However, R still crashes when resizing help windows, which
>don't have a user-settable default size.
>
>I am using R version 1.7.0, but can replicate this problem in the only other
>versions I have used: 1.4.1 and 1.6.2, in both MDI and SDI mode, all in
>Win2000.
This sounds like an existing bug (PR#1711) that we've found very hard
to reproduce.  However, I recently committed changes to the resize
code to fix another bug; it's conceivable my fix would have an effect
on this one too, hopefully positive! Could you please try R-patched?
You can download a binary build from my web page,

<http://www.stats.uwo.ca/faculty/murdoch/software/r-devel>

You want to get rw1070pat.exe from that page.

Duncan Murdoch

Duncan Murdoch wrote:
> On Tue, 13 May 2003 13:47:23 +0200 (MET DST), you wrote:
> 
> 
>>Full_Name: Gavin Alexander
>>Version: 1.7.0
>>OS: Win2000
>>Submission from: (NULL) (130.209.6.40)
>>
>>
>>When I resize the R-GUI console window by dragging an edge and drag for
more
>>than a second or two, R crashes. The program exits, leaving a pop-up
"Program
>>Error" box with the message:
>>"Rgui.exe has generated errors and will be closed by Windows.
>>You will need to restart the program.
>>An Error log is being created.".
>>
>>I now avoid having to resize the console window by setting the default
size in
>>GUI preferences. However, R still crashes when resizing help windows,
which
>>don't have a user-settable default size.
>>
>>I am using R version 1.7.0, but can replicate this problem in the only
other
>>versions I have used: 1.4.1 and 1.6.2, in both MDI and SDI mode, all in
>>Win2000.
> 
> 
> This sounds like an existing bug (PR#1711) that we've found very hard
> to reproduce.  However, I recently committed changes to the resize
> code to fix another bug; it's conceivable my fix would have an effect
> on this one too, hopefully positive! Could you please try R-patched?
> You can download a binary build from my web page,
> 
> <http://www.stats.uwo.ca/faculty/murdoch/software/r-devel>
> 
> You want to get rw1070pat.exe from that page.
> 
> Duncan Murdoch
> 
Duncan, the bug still persists in R-1.7.0 Patched (2003-05-13) which I 
just got via rsync.

Uwe

I tried R-1.7.0 Patched too and the problem hasn't changed.

I tried to replicate the bug on a colleague's machine and it behaved 
differently: In this case the window would freeze for a few seconds at a 
time while being resized. The cursor then also froze, requiring use of 
CtrlAltDel and Task Manager to kill the process. However, R didn't crash 
and exit by itself.

It's maybe worth pointing out that the problem can be removed (at least in 
Win2000) by going to Control Panel > Display Properties > Effects and 
deselecting "Show window contents while dragging".

Gavin


>Duncan, the bug still persists in R-1.7.0 Patched (2003-05-13) which I 
>just got via rsync.
>
>Uwe
>

* *
Dr Gavin D. Alexander
Department of Statistics
Mathematics Building
University Gardens
University of Glasgow
GLASGOW G12 8QW
SCOTLAND

Tel:   0141-330-4852
email: gavin@stats.gla.ac.uk

On Tue, 13 May 2003 15:57:36 +0100, you wrote:
>I tried R-1.7.0 Patched too and the problem hasn't changed.
I can reproduce this, and I'm close to having a patch to put in for
it.  However, I'm finding lots of oddities in Graphapp; I'm not sure
which of them is to blame!

 - GETHDC is being passed a null object, and is trying to dereference
it.  This is likely the immediate cause of the crash.  But where is
that null object coming from?

 - The reference counting code will only decrease the reference count
if the count is exactly 1, but it will increase any positive count.
This is probably causing memory leaks.

 - There's an array that caches "device contexts".  It's being
handled
in a very strange way.

Duncan Murdoch