README viewer: Issue 500

[a-n-dokuchaev]

• Can you reproduce the bug at https://try.gitea.io:
  • Yes (URL)
  • No
  • Not relevant
• Log gist:

Description

There are 2 repos:

• https://try.gitea.io/ahaha/testlinks
• https://try.gitea.io/ahaha/linksubmodule - available as testlinks/linksubmodule/

In the branch bug500 (https://try.gitea.io/ahaha/testlinks/src/branch/bug500) we have symlink README->linksubmodule/README.md and internal server error 500.

[silverwind]

It also highlights this regression from dd8ec12:

Edit: #12603 for that.