0e6ffd0243
* Don't try to report file size or timestamps for stdio streams. Calling `File::metadata()` on a stdio stream handle fails on Windows, where the stdio streams are not files. This `File::metadata()` call was effectively only being used to add file size and timestamps to the result of `filestat_get`. It's common for users to redirect stdio streams to interesting places, and applications generally shouldn't change their behavior depending on the size or timestamps of the file, if the streams are redirected to a file, so just leave these fields to 0, which is commonly understood to represent "unknown". Fixes #4497.
WASI implementation in Rust, using cap-std.