* src/editfns.c (Fformat): Correctly handle text properties on "%%".

1 files changed, 6 insertions, 3 deletions

diff --git a/src/editfns.c b/src/editfns.c
index f62efc30790..fb9ef7a5b9f 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -3721,7 +3721,11 @@ usage: (format STRING &rest OBJECTS)  */)
           memset (&discarded[format0 - format_start], 1, format - format0);
           conversion = *format;
           if (conversion == '%')
-            goto copy_char;
+            {
+              format0++;
+              nchars++;
+              goto copy_char;
+            }
           discarded[format - format_start] = 1;
           format++;
 
@@ -4138,8 +4142,7 @@ usage: (format STRING &rest OBJECTS)  */)
               while (! CHAR_HEAD_P (*format));
 
               convbytes = format - src;
-              memset (&discarded[format0 + 1 - format_start], 2,
-                      format - (format0 + 1));
+              memset (&discarded[format0 + 1 - format_start], 2, convbytes - 1);
             }
           else
             {