Sample doesn't work on Edge

[ssylvan]

This shows a blank page on Edge: https://emilk.github.io/egui/index.html

Should probably at least show some kind of error message if it isn't supported on Edge (or better yet, fix whatever prevents it from working).

[emilk]

Thanks for the report!

I don't have a Windows machine, so it is hard for me to debug. Does the developer console say anything helpful?

[ssylvan]

It says:

RuntimeError: unreachable
at __rust_start_panic (:wasm-function[1651]:0xe9459)
at rust_panic (:wasm-function[1330]:0xe7dde)
at std::panicking::rust_panic_with_hook::hc3afc981c0e7d6a8 (:wasm-function[998]:0xde523)
at std::panicking::begin_panic_handler::{{closure}}::hefb02c9f4c7b9e72 (:wasm-function[1290]:0xe76d3)
at std::sys_common::backtrace::__rust_end_short_backtrace::h3f57de3f451b589e (:wasm-function[1300]:0xe789c)
at rust_begin_unwind (:wasm-function[1259]:0xe705c)
at core::panicking::panic_fmt::he8b4f848efb7b83f (:wasm-function[1301]:0xe78d2)
at core::panicking::panic::h54d056b62390c882 (:wasm-function[1249]:0xe6dc9)
at egui_web::webgl::Painter::new::h6e457df76159f1af (:wasm-function[228]:0x58ba8)
at egui_web::backend::WebBackend::new::h280b638dcbcdba4a (:wasm-function[1003]:0xde8e7)

So I guess something unreachable in webgl is in fact reached? Sorry, web stuff is very much outside my wheel house so I'm not sure how to debug stuff like this.

[ssylvan]

Update: this went away after restarting Edge. So my hypothesis is that something in my browser session (probably up for days) caused a GPU hang in the past, which (I believe) causes edge to disable using the GPU from then on. Which in turn would disable things like WebGL.

So I think this is really more of "show error message if webgl fails to load" rather than an actual persistent issue on Edge.