1 files changed, 8 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
index 118519f36ff..e927a27088c 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1149,8 +1149,16 @@ a non-nil `permanent-local' property are not eliminated by this function.")
              Set it up for the current buffer with the default value.  */
 
           tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr;
+          /* Store the symbol's current value into the alist entry
+             it is currently set up for.  This is so that, if the
+             local is marked permanent, and we make it local again below,
+             we don't lose the value.  */
+          XCONS (XCONS (tem)->car)->cdr = XCONS (XSYMBOL (sym)->value)->car;
+          /* Switch to the symbol's default-value alist entry.  */
           XCONS (tem)->car = tem;
+          /* Mark it as current for the current buffer.  */
           XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer ();
+          /* Store the current value into any forwarding in the symbol.  */
           store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car,
                                    XCONS (tem)->cdr);
         }