2 files changed, 5 insertions, 1 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index 7a942ec79dc..1614a044cbf 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -2422,7 +2422,9 @@ struct it
   bool_bf string_from_display_prop_p : 1;
 
   /* True means `string' comes from a `line-prefix' or `wrap-prefix'
-     property.  */
+     property, and that these properties were already handled, even if
+     their value is not a string.  This is used to avoid processing
+     the same line/wrap prefix more than once for the same glyph row.  */
   bool_bf string_from_prefix_prop_p : 1;
 
   /* True means we are iterating an object that came from a value of a
diff --git a/src/xdisp.c b/src/xdisp.c
index 72a217513ef..85802ec5083 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -24415,6 +24415,7 @@ push_prefix_prop (struct it *it, Lisp_Object prop)
     {
       it->method = GET_FROM_STRETCH;
       it->object = prop;
+      it->string_from_prefix_prop_p = true;
     }
 #ifdef HAVE_WINDOW_SYSTEM
   else if (IMAGEP (prop))
@@ -24422,6 +24423,7 @@ push_prefix_prop (struct it *it, Lisp_Object prop)
       it->what = IT_IMAGE;
       it->image_id = lookup_image (it->f, prop, it->face_id);
       it->method = GET_FROM_IMAGE;
+      it->string_from_prefix_prop_p = true;
     }
 #endif /* HAVE_WINDOW_SYSTEM */
   else