* buffer.c (Fmake_overlay, Fmove_overlay):

* intervals.c (set_point_from_marker):
* print.c (PRINTPREPARE): Prefer signal_error
to plain error and report unsuitable marker too.

1 files changed, 11 insertions, 13 deletions

diff --git a/src/buffer.c b/src/buffer.c
index 1495bd65de7..c811890aefe 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -3834,7 +3834,8 @@ for the front of the overlay advance when text is inserted there
 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
 for the rear of the overlay advance when text is inserted there
 \(which means the text *is* included in the overlay).  */)
-  (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance)
+  (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer,
+   Lisp_Object front_advance, Lisp_Object rear_advance)
 {
   Lisp_Object overlay;
   struct buffer *b;
@@ -3843,12 +3844,11 @@ for the rear of the overlay advance when text is inserted there
     XSETBUFFER (buffer, current_buffer);
   else
     CHECK_BUFFER (buffer);
-  if (MARKERP (beg)
-      && ! EQ (Fmarker_buffer (beg), buffer))
-    error ("Marker points into wrong buffer");
-  if (MARKERP (end)
-      && ! EQ (Fmarker_buffer (end), buffer))
-    error ("Marker points into wrong buffer");
+
+  if (MARKERP (beg) && !EQ (Fmarker_buffer (beg), buffer))
+    signal_error ("Marker points into wrong buffer", beg);
+  if (MARKERP (end) && !EQ (Fmarker_buffer (end), buffer))
+    signal_error ("Marker points into wrong buffer", end);
 
   CHECK_NUMBER_COERCE_MARKER (beg);
   CHECK_NUMBER_COERCE_MARKER (end);
@@ -3974,12 +3974,10 @@ buffer.  */)
   if (NILP (Fbuffer_live_p (buffer)))
     error ("Attempt to move overlay to a dead buffer");
 
-  if (MARKERP (beg)
-      && ! EQ (Fmarker_buffer (beg), buffer))
-    error ("Marker points into wrong buffer");
-  if (MARKERP (end)
-      && ! EQ (Fmarker_buffer (end), buffer))
-    error ("Marker points into wrong buffer");
+  if (MARKERP (beg) && !EQ (Fmarker_buffer (beg), buffer))
+    signal_error ("Marker points into wrong buffer", beg);
+  if (MARKERP (end) && !EQ (Fmarker_buffer (end), buffer))
+    signal_error ("Marker points into wrong buffer", end);
 
   CHECK_NUMBER_COERCE_MARKER (beg);
   CHECK_NUMBER_COERCE_MARKER (end);