Odin + WASM - RuntimeError: memory access out of bounds

[cstrachan88]

I'm rendering Clay with Odin through WebGPU. Two targets: win64 (through GLFW) and js_wasm32. On desktop, everything is working as expected. For the wasm target, I am getting "RuntimeError: memory access out of bounds" when trying to access a rectangle config.

Code...

if clay.UI(
  clay.Rectangle(clay.RectangleElementConfig{color = clay.Color{255, 0, 0, 255}}),
  clay.Layout(clay.LayoutConfig{sizing = clay.Sizing{width = clay.SizingGrow({}), height = clay.SizingGrow({})}}),
) {}

for i in 0 ..< render_commands.length {
  render_command := clay.RenderCommandArray_Get(render_commands, i32(i))
  switch (render_command.commandType) {
    case clay.RenderCommandType.None:
    case clay.RenderCommandType.Text:
    case clay.RenderCommandType.Image:
    case clay.RenderCommandType.ScissorStart:
    case clay.RenderCommandType.ScissorEnd:
    case clay.RenderCommandType.Rectangle:
      config := renderCommand.config.rectangleElementConfig
      fmt.println(config)
      // BUG: Crashing here
    case clay.RenderCommandType.Border:
    case clay.RenderCommandType.Custom:
  }
}

The pointer to renderCommand.config.rectangleElementConfig is 64bit on desktop and 32 bit in the browser. I'm assuming it's being lopped off.

(Found Clay through your recent Youtube vid - looks nice and I'm excited to play with it some more)

[nicbarker]

Hello, and thanks for reaching out! I've seen a bit of weirdness around 32 vs 64bit pointers in wasm, so I'll take a closer look and let you know what I find.