The Persistence of Vision Raytracer (POV-Ray).

This is the legacy Bug Tracking System for the POV-Ray project. Bugs listed here are being migrated to our github issue tracker. Please refer to that for new reports or updates to existing ones on this system.

Attached to Project: POV-Ray
Opened by Phil M - 2010-07-09
Last edited by Christoph Lipka - 2012-07-17

FS#156 - Crash when reading from DF3 file with no data, using interpolation (div/0)

A df3 file is written, with header 00 00 00 00 00 00 and no data (hypothetically valid df3 file).
This file is used as density file for media, using interpolation. This causes a crash once Pov-Ray starts rendering the pixels that contain media.
All pixels rendered before that render fine. Using no interpolation does not cause a crash.

Sample Scene:
#fopen out “random.df3” write
#write (out, uint16be <0,0,0>)
#fclose out

box{0,1 pigment{rgbt 1} hollow interior{media{
density{density_file df3 “random.df3” interpolate 1}}}} // interpolate 2 also crashes, interpolate 0 does not.

System: Win7 x64, 3.7 Beta 38

Closed by  Christoph Lipka
Tuesday, 17 July 2012, 20:46 GMT
Reason for closing:  Fixed
Grimbert Jérôme commented on Saturday, 21 May 2011, 16:59 GMT

Confirmed with 3.7RC3 on linux.
Beware, the flyspray quote for filename must be replaced with the double-quote.

* glibc detected * povray: double free or corruption (fasttop): 0x0000000001be9de0 ***


Grimbert Jérôme commented on Sunday, 22 May 2011, 14:39 GMT

Should be corrected with #5440.

#5440 is only a protection: if any of the 3 size (x,y,z) of the DF3 is 0, do not compute.

It was crashing because the interpolation code use modulo the size... modulo 0 is a bad idea.


Available keyboard shortcuts


Task Details

Task Editing