"Comment and close" replaces first issue comment with last comment

[mxmehl]

• Gitea version (or commit ref): d155d0e
• Git version: 2.1.4
• Operating system: Debian 8
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL): https://try.gitea.io/mxmehl/test1/issues/1
  • No
  • Not relevant
• Log gist:

Description

This is a very severe bug because is modifies issues and potentially important information!

In an open issue, when clicking "comment and close", the text of the closing comment replaces the text of the first comment in this issue (fortunately not those in between).

Examples: https://try.gitea.io/mxmehl/test1/issues/1 or https://git.fsfe.org/pmpc/website/issues/89

[mxmehl]

This has already been the case with commit b0f7457, the version we had running before, but not with 5f4210a

[lafriks]

Not present in 1.2.0-rc2 only on master branch

[mxmehl]

The bug also happens when reopening an issue with a comment.

Does anyone have an idea how this could have been caused in the latest commits?

[mxmehl]

Workaround: Comment on an issue, and close it in a second step. Then the first message isn't overwritten. But who does it this way if there's a shortcut?