org snippet caused 500 internal server error

[Iced-Sun]

Gitea Version

1.15.2

Git Version

No response

Operating System

No response

How are you running Gitea?

Helm chart.

Database

No response

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Description

A source block with http language modifier in org-mode file causes render failure with 500 internal server error for gitea-1.15.2. A demo is located at https://try.gitea.io/Iced-Sun/org/src/branch/master/test.org.

#+begin_src http
POST https://httpbin.org/post
Content-Type: application/json

{
  "foo": "bar"
}
#+end_src

It used to work on gitea-1.14.6 and before.

Screenshots

No response

[zeripath]

Thank you for providing a test case, however the logs would have been helpful too.

[Iced-Sun]

Here is the relevant log:

2021/09/24 06:55:23 ...ers/web/repo/view.go:522:renderFile() [E] Render: orgmode.Render failed: could not write output: runtime error: index out of range [0] with length 0

[zeripath]

OK looks like there is a panic:

			if _, err := w.WriteString(highlight.Code(lexer.Config().Filenames[0], source)); err != nil {
				return ""
			}

likely the lexer.Config().Filenames is empty.