Hello, In commit 0260d2fcf603f30210e2b95d37727edd832c12e9 of 2021-04-26, the regexp used in `org-agenda-prefix-format' was updated to use a non-greedy regexp, in order to allow multiple %(expression) instances in `org-agenda-prefix-format'. Unfortunately, this change breaks the ability to use nested forms in %(expression) instances. For example, I use the following setting for `org-agenda-prefix-format':
(setf (alist-get 'agenda org-agenda-prefix-format) " %(format-time-string \"%a\" (org-get-deadline-time (point))) ") When running `org-agenda', I now receive the error `org-compile-prefix-format: End of file during parsing'. This is because of the updated regexp match, which stops at the first closing parenthesis: ELISP> myfmt " %(format-time-string \"%a\" (org-get-deadline-time (point))) " ELISP> (and (string-match "%\\(\\?\\)?\\([-+]?[0-9.]*\\)\\([ .;,:!?=|/<>]?\\)\\([cltseib]\\|(.+?)\\)" myfmt) (match-string 4 myfmt)) "(format-time-string \"%a\" (org-get-deadline-time (point)" With the previous regexp, it works fine: ELISP> (and (string-match "%\\(\\?\\)?\\([-+]?[0-9.]*\\)\\([ .;,:!?=|/<>]?\\)\\([cltseib]\\|(.+)\\)" myfmt) (match-string 4 myfmt)) "(format-time-string \"%a\" (org-get-deadline-time (point)))" Thanks, Radon Rosborough