[FLASH-USERS] xflash is crashing

[Mike Zingale]

This is a likely bug in IDL that is interacting with a recently patched 
buffer overflow in the xorg server, see:

http://www.ittvis.com/services/techtip.asp?ttid=4177

They recommend you roll back your libx11 or wait for IDL 6.4

Mike



On Mon, 4 Jun 2007, 
Vincenzo Antonuccio wrote:

> I have a problem using xflash. Here is my configuration:
>
> FLASH v. 2.5, using fidlr3
> IDL: version 6.3, on
> HDF5 v. 1.6.2
>> uname -a: Linux uist 2.6.8-3-686 #1 Tue Dec 5 21:26:38 UTC 2006 i686
> GNU/Linux
>
> I can successfully launch xflash: I get in fact the widget. Then I try to
> upload one of the HDF5, 2D sedov outputs. The file is correctly read. But
> when I try to plot density or pressure or something else, IDL goes into
> segmentation fault.
>
> Now: I know that at page 231 of the FLASH v. 2.5 UG is written that, for IDL
> v. 6.0 and higher, there is a problem with HDF5, so one should revert to
> fidlr2. AND THIS IS WHAT I DID, but the result is the same: as soon as I try
> to plot something using xflash, I get segmentation fault.
>
> Now, I have tried to debug the problem, and I think that it arises when
> TVIMAGE calls CMCONGRID, around this point:
> .............
>   2: BEGIN ; *** TWO DIMENSIONAL ARRAY
>   IF int THEN BEGIN
>     srx = float(s(1) - m1) / (x-m1) * findgen(x) + halfx
>     sry = float(s(2) - m1) / (y-m1) * findgen(y) + halfy
> ;print, 'check #2', 'ok 0a'
>          RETURN, INTERPOLATE(arr, srx, sry, /GRID, CUBIC=cub)
> ;print, 'check #2', 'ok 0b'
> ...........
>
> (The commented "print" are mine). What I can see is that IDL crashes at
> "RETURN, INTERPOLATE(arr, srx, sry, /GRID, CUBIC=cub)".
>
> Any idea/suggestion?
>
> Many thanks in advance
>
> ******************************************
>     Vincenzo ANTONUCCIO-DELOGU
>
> Astrophysics, University of Oxford
> Denys Wilkinson Building
> Keble Road, Oxford OX1 3RH
> United Kingdom
>
> and
>
> INAF - Catania Astrophysical Observatory,
> Catania, ITALY
>
> Room 555A, Beecroft Inst. for Particle Astrophysics
> Tlf.: +44-(0)1865 283019
> Fax:  +44-(0)1865-273390
>
> e-mail: van at astro.ox.ac.uk
> skype: eurocosmo
>


-----------------------------------------------------------------------------
Michael Zingale (mzingale at mail.astro.sunysb.edu)
Assistant Professor

Dept. of Physics and Astronomy     office: ESS 440
SUNY Stony Brook                   phone:  631-632-8225
Stony Brook, NY 11794-3800         web: http://www.astro.sunysb.edu/mzingale
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