Iced: Memory leak on mac

[pbspbsingh]

Noticed a lot of memory leak while running any example app on my macbook.
Attaching Leaks screenshots for todo example:

[hecrj]

Hey, thanks for testing!

I am not an expert on this, but I don't think the codebase has many instances where memory leaks can happen (no unsafe, no std::mem::forget, no cycles of shared references).

I believe wgpu may have fixed memory leaks in the latest release. It may be interesting to run the tests with the updated iced_wgpu version in #269.

[hecrj]

I just investigated a bit and wgpu does not seem to be leaking any memory. Instead, I believe I ended up finding a memory leak in winit when cloning a proxy (which iced does quite a bit).

I have reported the issue: https://github.com/rust-windowing/winit/issues/1525

__Update__: Implemented a fix in https://github.com/rust-windowing/winit/pull/1526

[pbspbsingh]

Thanks for investigating and submitting the PR to winit 🙏🏽

[hecrj]

Closing as the fix was merged and landed in the 0.22.2 release of winit.