Undefined array key exception when creating Markdown pages with only front matter and no Markdown

[caendesilva]

Creating a file just like this (for example _pages/foo.md) causes a discovery exception

---
foo: bar
---

   RuntimeException

  An error occurred during the discovery process: Undefined array key 0

  at packages\framework\src\Foundation\Concerns\BaseFoundationCollection.php:54
     50▕         try {
     51▕             $this->runDiscovery();
     52▕             $this->runExtensionHandlers();
     53▕         } catch (Throwable $exception) {
  ➜  54▕             throw new RuntimeException("An error occurred during the discovery process: {$exception->getMessage()}", previous: $exception);
     55▕         }
     56▕
     57▕         return $this;
     58▕     }

  1   vendor\spatie\yaml-front-matter\src\ComplexMarkdownParser.php:87
      ErrorException::("Undefined array key 0")

  2   vendor\spatie\yaml-front-matter\src\ComplexMarkdownParser.php:87
      Illuminate\Foundation\Bootstrap\HandleExceptions::Illuminate\Foundation\Bootstrap\{closure}("Undefined array key 0", "H:\monorepo\vendor\spatie\yaml-front-matter\src\ComplexMarkdownParser.php")

[caendesilva]

Adding a newline solves this, but I think we should still handle this gracefully, so confirming this as a bug.

---
foo: bar
---

[caendesilva]

I think this might best be handled in the upstream package, so gonna make a PR.

[caendesilva]

Fixed by spatie/yaml-front-matter#41 through #1728