(Fformat): While copying text properties, make each composition

property value a copy.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/editfns.c b/src/editfns.c
index 63c1183837c..d2734a0166a 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -3201,6 +3201,10 @@ Use %% to put a single % into the output.")
               new_len = make_number (info[n].end - info[n].start);
               props = text_property_list (args[n], make_number (0), len, Qnil);
               extend_property_ranges (props, len, new_len);
+              /* If successive arguments have properites, be sure that
+                 the value of `composition' property be the copy.  */
+              if (n > 1 && info[n - 1].end)
+                make_composition_value_copy (props);
               add_text_properties_from_list (val, props,
                                              make_number (info[n].start));
             }