Shader crashes when quitting with unfinished IRR

rui_mac

I coded a shader and it is working fine.
However, when I have IRR on and I quit Cinema4D before the IRR finishes rendering, I get a crash. If the IRR finishes and I quit, everything works fine.
What could it be?

ferdinand

Hey @rui_mac,

Thank you for reaching out to us. Without your code we can just guess.

This is likely an access violation, i.e., your plugin somehow causes your machine trying to access already deleted memory.
The first thing I would do, is check if this is indeed caused by your plugin. Simply replace your shader with a builtin shader in a scene which crashes and see if it also crashes.
Given your recent questions this probably has something to do with ShaderData::InitRender and ::FreeRender and the fact that you are poking around in the ray objects.
The major distinguishing factor between an IRR and a Picture Viewer render is that the latter does clone the document while the former does not. I would check if your plugin also crashes for 'normal' viewport renders (also do not clone the document). On its own this does not make a difference, but when you have bad code, like for example a shader that tries to modify its document, or code that assumes that the shader always lives in the active document, this can lead to crashes (always use BaseList2D::GetDocument() to access the document of a node).
Finally, for anything substantial, you should submit a crash report when Cinema 4D asks you to do so, make your code available to us, and submit a bug report. Please follow the guidelines given here for bug reports.

Cheers,
Ferdinand

rui_mac

It seems not to crash now. I made sure I freed all the bitmaps and flushed all containers.