Fix int overflow bug in ‘equal’

* src/fns.c (internal_equal):
Fix bug when vector lengths exceed INT_MAX.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/fns.c b/src/fns.c
index 7d5443150d4..8307a36a09d 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -2425,7 +2425,6 @@ internal_equal (Lisp_Object o1, Lisp_Object o2, enum equal_kind equal_kind,
 
     case Lisp_Vectorlike:
       {
-        register int i;
         ptrdiff_t size = ASIZE (o1);
         /* Pseudovectors have the type encoded in the size field, so this test
            actually checks that the objects have the same type as well as the
@@ -2479,7 +2478,7 @@ internal_equal (Lisp_Object o1, Lisp_Object o2, enum equal_kind equal_kind,
               return false;
             size &= PSEUDOVECTOR_SIZE_MASK;
           }
-        for (i = 0; i < size; i++)
+        for (ptrdiff_t i = 0; i < size; i++)
           {
             Lisp_Object v1, v2;
             v1 = AREF (o1, i);