Mapping to invalid path delimiter on Windows

[L0g4n]

I have a link to sass file in my index.html like that

<link rel="stylesheet" href="scss/index.scss">

On Unix platforms this works when running trunk serve from the crate directory.
However, on Windows I get an error:
skipping invalid path: \\?\C:\Users\USERNAME\PATH_TO_WD\frontend\scss/index.scss

It seems that trunk does not properly map the slash to the backslash as a forward slash can be seen in the error message.
It works fine if i replace the slash with a backslash, but that would break unix platforms.

[L0g4n]

So, I am currently looking through the source code to see if I might be able to fix that myself.
I think the problem is that in AssetFile::new() fs::canonicalize is used which is the async version from async-std. The docs for the sync version of this says: https://doc.rust-lang.org/std/fs/fn.canonicalize.html

On Windows, this converts the path to use extended length path syntax, which allows your program to use longer path names, but means you can only join backslash-delimited paths to it, and it may be incompatible with other applications (if passed to the application on the command-line, or written to a file another application may read).

I guess this means that either this subsequent if clause is false (what does the "://" pattern stand for?)

if !path.to_string_lossy().contains("://") {
    progress.println(format!("{}skipping invalid path: {}", Emoji("︎🚫 ", ""), path.to_string_lossy()));
}

or the asset file join logic that is passed to this function is false. Because a normal slash is at one part joined with the rest of the path which results in a invalid Windows path.