zig-gamedev: zgpu: Memory leak in samples (Dawn leaks ~20KB per frame on macOS)

It seems like all the samples have are leaking memory. One can detect this by observing the memory usage of the sample goes up over time.

zig version: 0.10.0-dev.4249+11dce7894

$ zig build triangle_wgpu-run      
info: [zgpu] High-performance device has been selected:
info: [zgpu]   Name: Apple M1
info: [zgpu]   Driver: Metal driver on macOS Version 12.6 (Build 21G115)
info: [zgpu]   Adapter type: discrete_gpu
info: [zgpu]   Backend type: meta

Here is a capture of the triangle sample’s memory usage captured once per second:

    48 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
 95216 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
 96368 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
 97424 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
 98512 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
 99504 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
100528 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
101552 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
102544 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
103584 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
104576 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
105584 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
106656 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
107696 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
108720 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
109712 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu
110800 michal-z/zig-gamedev/zig-out/bin/triangle_wgpu

In Activity Monitor memory usage seems to go up by 40 megabytes per second.

I commented out zgui and the leak remains.