"Connection reset" / "Empty reply from server" instead of HTTP 404

[vilcans]

Bug Report

It seems that whenever zola serve doesn't find a file, it just closes the connection instead of returning a 404 page not found error.

Environment

OS: Linux Mint
Zola version: 0.14.0

Expected Behavior

Non-existent URL should give proper HTTP error response.

Current Behavior

No output in the console. Server sends an empty response:

$ curl localhost:1111/adfasdf
curl: (52) Empty reply from server

In Firefox, this shows the error message:

The connection was reset
The connection to the server was reset while the page was loading.

Step to reproduce

zola init zolabug
cd zolabug
zola serve
curl https://localhost:1111/asdf