Template errors are silently swallowed

[chocolateboy]

parcel-plugin-nunjucks	1.0.0
parcel	1.9.7
node	v10.9.0
OS	Linux (Arch)

Many types of error inside templates are not reported. This is due to a bug in nunjucks which throws errors asynchronously (and thus invisibly) if render or renderString are called synchronously.

$ cat example.njk

{% include "no-such-file.html" %}

<h1>Example</h1>

$ parcel build example.njk
# no error

$ cat dist/example.html
null