[Bug web/67119] New: URL linking to previous patches are not available

[songlinhai0543 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67119

            Bug ID: 67119
           Summary: URL linking to previous patches are not available
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: web
          Assignee: unassigned at gcc dot gnu.org
          Reporter: songlinhai0543 at gmail dot com
  Target Milestone: ---

I am tracking some old bugs. I notice that many bug patches are not available
from the URL in the bug report. 

For example:

https://gcc.gnu.org/viewvc/gcc?cvsroot=gcc&r1=1.65&r2=1.66

How should I revise the above URL and find related patches?