Here's a set of updates that could probably help trace the problem:
- I rebuilt emacs from master using make bootstrap, but the problem persists.
- I see the problem when I do "M-x avy-goto-line 10" but not when I do "M-: (avy-goto-line 10)". So the bug triggers only during interactive execution?
A workaround for now is to delete the avy.elc file.
Does the avy--process code not work well with the recently byte compiler incompatibility in the master branch?