On the latest release (9.3.7), I am running into an infinite loop when clocking in a blocked task if `org-enforce-todo-dependencies` is set to `t`.
The (manual) call stack is: org-agenda-clock-in org-agenda.el:9760 org-agenda-change-all-lines org-agenda.el:9391 org-agenda-finalize org-agenda.el:3879 org-agenda-dim-blocked-tasks The while loop on line 4012 is infinite in this case. The problem is because when `org-agenda-finalize` is called, the region is narrowed to a single line. Then in `org-agenda-dim-blocked-tasks` the function `(move-beginning-of-line 2)` is called to advance the point, which does not work when the buffer has a single line. In an earlier version, the command `(forward-line)` was called which moved the point to eol when the buffer had a single line. -- Al Emacs : GNU Emacs 27.1 (build 4, x86<sub>64</sub>-pc-linux-gnu, GTK+ Version 3.22.30, cairo version 1.15.10) of 2020-08-21
