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-rw-r--r--modules/calendar-sync-recurrence.el12
1 files changed, 9 insertions, 3 deletions
diff --git a/modules/calendar-sync-recurrence.el b/modules/calendar-sync-recurrence.el
index bc1cc92f..2689cdd6 100644
--- a/modules/calendar-sync-recurrence.el
+++ b/modules/calendar-sync-recurrence.el
@@ -195,10 +195,16 @@ Handles both simple values and values with parameters like TZID."
(pos 0))
;; Find all EXDATE lines. One line may carry several comma-separated
;; datetimes (RFC 5545); split them so each is excluded individually.
+ ;; Capture the match end BEFORE split-string: its internal matching
+ ;; clobbers the match data, and reading (match-end 0) afterwards made
+ ;; pos jump backwards to a comma offset inside the value -- re-matching
+ ;; the same line forever and growing the list until the OOM killer
+ ;; intervened (took two agent sessions down on 2026-07-13).
(while (string-match "^EXDATE[^:\n]*:\\([^\n]+\\)" event-str pos)
- (dolist (val (split-string (match-string 1 event-str) "," t))
- (push val exdates))
- (setq pos (match-end 0)))
+ (let ((line-end (match-end 0)))
+ (dolist (val (split-string (match-string 1 event-str) "," t))
+ (push val exdates))
+ (setq pos line-end)))
(nreverse exdates))))
(defun calendar-sync--get-exdate-line (event-str exdate-value)