Deno: error when running: deno run main.js

[iamfredrickokereke]

While trying to check deno today I noticed, the command "deno run main.js" fails but works with "deno run main.ts" or any other file name.

Example error:
thread 'main' panicked at 'called Result::unwrap() on an Err value: Utf8Error { valid_up_to: 0, error_len: Some(1) }', cli\file_fetcher.rs:622:41
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

[kitsonk]

Not able to reproduce on close to master on OSX.

What specific version (deno --version) and what operating system?

[nayeemrmn]

Can you show the content of main.js? Edit: Nevermind I assume it's the same.

[iamfredrickokereke]

@kitsonk @nayeemrmn please find below both the content and version
NB: This is running on windows, and it was installed using the Admin privilege of PowerShell with this script "iwr https://deno.land/x/install/install.ps1 -useb | iex" from deno.land.

[gewoonwoutje]

I've had this before, try to change the file encoding to UTF-8 as a workaround.

Linking to #1489 and #627

[iamfredrickokereke]

Thanks, @gewoonwoutje, but mine was already on UTF-8, checked this on 2 other PCs the same issue.

[gewoonwoutje]

I can only reproduce this when I change the source file encoding to something non-UTF8.

What is the status bar saying in the bottom corner? It should show UTF-8 also, otherwise you can try forcing it to UTF8 by toggling and saving in another encoding and back again.

[iamfredrickokereke]

Thank you @gewoonwoutje, toggling it to UTF-8 resolves this issue, and returns expected output.

[kitsonk]

Feels like on Windows that we might want to at least trap a more informative error about not supporting non-UTF8 encoding.

[iamfredrickokereke]

yes @kitsonk that would be helpful for other windows users, Thank you.

[iamfredrickokereke]

Resolved.