Error thrown in loadTheme after renderTheme

[brandonjp]

I'm troubleshooting a stencil-cli issue where stencil server is throwing an error: Cannot read property 'fn' of null

I finally tracked it down to line 30 of pencil-response.js in stencil-cli. However, the actual error from stencil-cli is pretty unhelpful.

When I log the templatePath and data returned on line 29 the data appears almost identical for products that are rendering and products that are not.

Can anyone help me understand what would be triggering an error such as this: Cannot read property 'fn' of null ? Such as... would it be client-side JS? or by something contained in product data returned from BigCommerce? etc.

Trying however I can to track this down. Anything helps! Thanks.

[brandonjp]

I found it!
Apparently stencil's handlebars doesn't like this uppercase inside of replace:

{{#replace (uppercase brand.name) (uppercase name)}}{{/replace}}

Using lowercase or toLowerCase does not produce the error and works like a charm.

But daaaang, better error logging would be reeeaal helpful.