heex compilation warning and no syntax highlighting between 0.36 - 0.37

[bcardarella]

I'm cutting a new release of LVN and we use the heex code fence for syntax highlighting of our projects.

this hasn't been an issue in the past, but today I'm getting this warning during documentation compilation:

warning: crashed while highlighting heex snippet:

<pre><code class="heex">&lt;LiveForm
  id=&quot;my-form&quot;
  phx-change=&quot;form-changed&quot;
  phx-submit=&quot;submit&quot;
&gt;
  &lt;TextField name=&quot;username&quot;&gt;Username&lt;/TextField&gt;
  &lt;SecureField name=&quot;password&quot;&gt;Password&lt;/SecureField&gt;
  &lt;LiveSubmitButton&gt;Submit&lt;/LiveSubmitButton&gt;
&lt;/LiveForm&gt;</code></pre>
  (makeup_eex 2.0.2) lib/makeup/lexers/eex_lexer/application.ex:39: Makeup.Lexers.EExLexer.Application.dynamic_html_lexer/0
  (makeup_eex 2.0.2) lib/makeup/lexers/heex_lexer.ex:257: Makeup.Lexers.HEExLexer.lex/2
  (makeup 1.2.1) lib/makeup.ex:48: Makeup.highlight_inner_html/2
  (ex_doc 0.37.2) lib/ex_doc/doc_ast.ex:223: ExDoc.DocAST.render_code/6
  (ex_doc 0.37.2) lib/ex_doc/doc_ast.ex:181: ExDoc.DocAST.highlight_code_block/6
  (elixir 1.18.0) lib/regex.ex:808: Regex.apply_list/5
  (elixir 1.18.0) lib/regex.ex:803: Regex.apply_list/5
  (elixir 1.18.0) lib/regex.ex:809: Regex.apply_list/5

Here is the document:

<LiveForm
  id="my-form"
  phx-change="form-changed"
  phx-submit="submit"
>
  <TextField name="username">Username</TextField>
  <SecureField name="password">Password</SecureField>
  <LiveSubmitButton>Submit</LiveSubmitButton>
</LiveForm>

Did something change between 0.36 (working) to now? I haven't dug in but if there is now validation happening then that puts us out as our syntax highlighting is identical to heex but we don't validate as heex

[josevalim]

The bug was in ExDoc accidentally swallowing the error message. Once that was fixed, we got this:

** (RuntimeError) The HEEx / EEx+HTML lexer requires an HTML lexer to be registered. You can do this for example by including

    {:makeup_html, "~> 1.0"}

in your project's dependencies.

So add that as a dependency and you should be good to go!

[bcardarella]

thanks!