[Crito]

> "As always, if you encounter problems building or using Emacs, please send a report to address@hidden with full details"

What's up with "address@hidden"?

[tjr]

This is the web representation of a mailing list email, and the software that prepares the message for viewing on the web conceals email addresses like that, to help mitigate people receiving unwanted mail (e.g., and probably especially, spam).

Had you been on the mailing list and received this content via mail, the address would have ostensibly not been concealed.

[unsignedint]

There's also M-x report-emacs-bug (also accessible from the menu Help -> Send Bug Report... which (somewhat) automates bug reporting.

It also populates all the information useful for devs.

The reporting address seems to be bug-gnu-emacs at gnu.org