Random set_scissor_rect error

[Uriopass]

This is very weird and for some reason seems to be totally random, but once in a while and only since 0.7 update, my app sometimes crash with this error.

wgpu error: Validation Error

Caused by:
    In a RenderPass
      note: encoder = `<CommandBuffer-(0, 82, Vulkan)>`
    In a set_scissor_rect command
    Invalid ScissorRect parameters

I wish I could show how to reproduce it, but since it's not consistent at all I don't really know what to give.
In the meantime, maybe there's a way to validate the set_scissor_rect here to avoid crashing or to print something more helpful when it happens ?

It might also be a problem upstream where imgui randomly (UB?) gives wrong scissor rect parameters

EDIT: Also, it doesn't appear to happen with the hello_world example

[Uriopass]

Looking at wgpu code, the error comes from this condition

if rect.w == 0
  || rect.h == 0
  || rect.x + rect.w > info.extent.width
  || rect.y + rect.h > info.extent.height
{
    return Err(RenderCommandError::InvalidScissorRect).map_pass_err(scope);
}

maybe it can happen that the scissor is zero, in which case we should just skip rendering instead ?

[Uriopass]

I found it! it's a synchronization problem between the renderpass target texture size and the actual window size when resizing.

If this happens for someone else: Make sure that when rendering the window size as seen by imgui (in my case I used the imgui winit support crate) and the target texture in the ui render pass are the same size.