Tablib loader should throw if marko-tag.json renderer is not found

[mlrawlings]

Bug Report

Marko Version: 4.7.5

Details

With a marko-tag.json like the following, where the renderer is explicitly set to index.marko, if the .marko extension is not registered, the file will not be found and there is no error (except any errors caused by the custom tag not being found).

{
   "renderer": "./index"
}

Expected Behavior

The taglib loader should throw if an explicitly referenced file is not found.

Actual Behavior

Silence

[tigt]

I’d like to try and fix this, but I’m curious about where in the Marko toolchain I should do the fs.exists() — my first guess is src/taglib/taglib-loader/loadTagFromProps.js’s renderer() method?