ray_trace fails when built using O2 or O3 optimization

[antoimau]

Hello,

We noticed that in some cases, ray_trace exits with non-zero status when it's compiled with -O3 or -O2, and exits with zero status with the same data when compiled with -O1

Here is the problematic call:

ray_trace -output <output_path.rgb> -nolight -bg 'black' -size 197 92 -ortho -view -1 0 0 0 0 1 \
-eye 256 -2.332 -33.9582 -window_width 256.957 -reverse_order_colouring -under black \
-over white -spectral 0 500 <vol_noise.mnc> 0 1  <obj1.obj>  -delete_volume 0 \
-line_width 0.530389 -line_width 0.530389 <obj2.obj> -line_width -1 -line_width -1 \
-line_width 0.530389 -line_width 0.530389 <obj3.obj> -line_width -1 -line_width -1

We attached a zip folder in which we put the input data we used for the previous call.
Files: data_for_community.zip

Let me know if you have any questions,
Best,
Antoine

[gdevenyi]

Hi @antoimau to clarify, are you getting the proper outputs from ray_trace, but its returning a bad return code?

[gdevenyi]

Also, can you please specify the version of minc-toolkit you're using, and how you installed it (binary packages or build from source)

[antoimau]

Hello @gdevenyi,

No ray-trace would not generate the output file <output_path.rgb>. However, it would not crash but running echo $? after the call is returning 1.
We have installed the minc-toolkit using the build from the source. Also, we are using the version develop-1.9.18

Thank you for your answer.

[gdevenyi]

The example files you uploaded (obj{1..3}.obj and vol_noise.mnc) are completely empty. In fact, obj2 and obj3 are zero-size.

Perhaps this is the origin if your issues.

[antoimau]

Hello,

Yeah, it is something we noticed but it does not seem to be the issue. Indeed, I haven't realized I provided an empty volume. I attach here a new vol_noise.mnc with which, we still have the issue.

Concerning the empty .obj, we have a good version of an old the minc-toolkit (mincresample -version says 2.2.00 but I am not sure how we built it) that produces a good output and which is able to deal with empty .obj files. The version of ray_trace compiled with O1 is also able to deal with the same inputs and would produce the same output. Note that output is not empty.
I also attach here the good output produced by the ray_trace call.

files: files_for_community.zip

Thank you for your help

[gdevenyi]

Can you reproduce these with valid volumes and obj files?