Unable to view milestone

[CirnoT]

• Gitea version (or commit ref): 1.12.0+dev-33-gc61b90253
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes - https://try.gitea.io/Cirno/test_repo/milestone/858
  • No
  • Not relevant
• Log gist:

template: repo/issue/milestone_issues:252:46: executing "repo/issue/milestone_issues" at <(len .PullRequest.ConflictedFiles) gt 0>: can't give argument to non-function len .PullRequest.ConflictedFiles

Description

Attempting to view milestone generates this error. This only happens if there is at least one PR in milestone and it does not matter if its conflicting or not.