(smerge-match-conflict): Try to do something sensible

for nested conflict markers.
(smerge-find-conflict): Better handle errors in smerge-match-conflict.

1 files changed, 13 insertions, 4 deletions

diff --git a/lisp/smerge-mode.el b/lisp/smerge-mode.el
index bd4d8d04a6f..80547821343 100644
--- a/lisp/smerge-mode.el
+++ b/lisp/smerge-mode.el
@@ -477,6 +477,13 @@ An error is raised if not inside a conflict."
 
           ;; handle the various conflict styles
           (cond
+           ((save-excursion
+              (goto-char mine-start)
+              (re-search-forward smerge-begin-re nil end))
+            ;; There's a nested conflict and we're after the the beginning
+            ;; of the outer one but before the beginning of the inner one.
+            (error "There is a nested conflict"))
+
            ((re-search-backward smerge-base-re start t)
             ;; a 3-parts conflict
             (set (make-local-variable 'smerge-conflict-style) 'diff3-A)
@@ -521,9 +528,11 @@ The submatches are the same as in `smerge-match-conflict'.
 Returns non-nil if a match is found between the point and LIMIT.
 The point is moved to the end of the conflict."
   (when (re-search-forward smerge-begin-re limit t)
-    (ignore-errors
-      (smerge-match-conflict)
-      (goto-char (match-end 0)))))
+    (condition-case err
+        (progn
+          (smerge-match-conflict)
+          (goto-char (match-end 0)))
+      (error (smerge-find-conflict limit)))))
 
 (defun smerge-diff (n1 n2)
   (smerge-match-conflict)
@@ -673,5 +682,5 @@ buffer names."
 
 (provide 'smerge-mode)
 
-;;; arch-tag: 605c8d1e-e43d-4943-a6f3-1bcc4333e690
+;; arch-tag: 605c8d1e-e43d-4943-a6f3-1bcc4333e690
 ;;; smerge-mode.el ends here