Vizonex/Winloop

AI Summary: The `start_tls()` method in `StreamWriter` (and `loop`) fails to correctly upgrade an existing stream to TLS, leading to the loss of any buffered data in the `StreamReader` and causing the call to hang indefinitely. This critical issue affects both `asyncio` and `uvloop`, but a proposed solution has already been provided and linked in a CPython pull request.

AI Summary: This GitHub issue reports a bug in `winloop` where `Process.stdin.write` and `Process.stdin.drain` methods do not immediately raise an error after the child process's stdin pipe has been closed. This behavior deviates from `uvloop` and Python's default `asyncio` event loop, which correctly raise exceptions in such scenarios. A reproducible Python script demonstrates this inconsistency, highlighting that `winloop` only raises on subsequent calls.