Seems like by adding tests/res/templates/__init__.py, *.pyc files are being generated, which trips up the FileSystemLoader when trying to parse those as utf-8. I have a fix, but I'm unsure how to update somebody else's pull request. @gsemet, please let me know how you would like to handle this. Happy to cherry-pick your commit onto a fork and create new PR (retaining the original author, or resetting the commit's author if you prefer), or somehow update your fork and therefore this PR. Thanks!

Oh if you know how to fix it, you can put a PR on top of my PR :)

Please see #1023 and gsemet#1 . Hope this helps!

is this going to be fixed and merged soon?

ok i have merged your pr but i will maybe redo it

@gsemet when can i expect it to be merged into jinja?

I’m looking to rebase it properly

ok, should be ok now :)

will wait for this to be merged

I really appreciate that you started work on this, getting rid of the dependency on setuptools and pkg_resources is good. I'm closing this in favor of #1082, which only updates the existing PackageLoader and avoids the constraints of importlib.resources.