From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 19 Apr 2011 01:11:43 +0000 (-0700)
Subject: * fns.c (internal_equal): Don't assume size_t fits in int.
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* fns.c (internal_equal): Don't assume size_t fits in int.
---

diff --git a/src/ChangeLog b/src/ChangeLog
index 21b5bd2cfa1..c44f9a0a6f0 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,7 @@
 2011-04-19  Paul Eggert  <eggert@cs.ucla.edu>
 
+	* fns.c (internal_equal): Don't assume size_t fits in int.
+
 	* alloc.c (compact_small_strings): Tighten assertion a little.
 
 	Replace pEd with more-general pI, and fix some printf arg casts.
diff --git a/src/fns.c b/src/fns.c
index 3771820753e..20190399f9a 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -2063,14 +2063,12 @@ internal_equal (register Lisp_Object o1, register Lisp_Object o2, int depth, int
 	/* Boolvectors are compared much like strings.  */
 	if (BOOL_VECTOR_P (o1))
 	  {
-	    int size_in_chars
-	      = ((XBOOL_VECTOR (o1)->size + BOOL_VECTOR_BITS_PER_CHAR - 1)
-		 / BOOL_VECTOR_BITS_PER_CHAR);
-
 	    if (XBOOL_VECTOR (o1)->size != XBOOL_VECTOR (o2)->size)
 	      return 0;
 	    if (memcmp (XBOOL_VECTOR (o1)->data, XBOOL_VECTOR (o2)->data,
-			size_in_chars))
+			((XBOOL_VECTOR (o1)->size
+			  + BOOL_VECTOR_BITS_PER_CHAR - 1)
+			 / BOOL_VECTOR_BITS_PER_CHAR)))
 	      return 0;
 	    return 1;
 	  }