* bignum.c (bigtrunc): RBIGNUM(x)->len may be zero. out of bound

	  access.  [ruby-dev:31404]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@13468 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 10 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index 3364b098c2..b4e3408cf1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Sep 19 11:13:07 2007  Yukihiro Matsumoto  <[email protected]>
+
+	* bignum.c (bigtrunc): RBIGNUM(x)->len may be zero.  out of bound
+	  access.  [ruby-dev:31404]
+
 Mon Sep 17 05:24:13 2007  Sylvain Joyeux <[email protected]>
 
 	* ext/thread/thread.c (lock_mutex): should take care of threads
diff --git a/bignum.c b/bignum.c
index 547759f099..788eb4bfd2 100644
--- a/bignum.c
+++ b/bignum.c
@@ -103,6 +103,7 @@ bigtrunc(x)
     long len = RBIGNUM(x)->len;
     BDIGIT *ds = BDIGITS(x);
 
+    if (len == 0) return x;
     while (--len && !ds[len]);
     RBIGNUM(x)->len = ++len;
     return x;
diff --git a/version.h b/version.h
index a04d9b76f9..004743fa7a 100644
--- a/version.h
+++ b/version.h
@@ -1,15 +1,15 @@
 #define RUBY_VERSION "1.8.6"
-#define RUBY_RELEASE_DATE "2007-09-17"
+#define RUBY_RELEASE_DATE "2007-09-19"
 #define RUBY_VERSION_CODE 186
-#define RUBY_RELEASE_CODE 20070917
-#define RUBY_PATCHLEVEL 106
+#define RUBY_RELEASE_CODE 20070919
+#define RUBY_PATCHLEVEL 107
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
 #define RUBY_VERSION_TEENY 6
 #define RUBY_RELEASE_YEAR 2007
 #define RUBY_RELEASE_MONTH 9
-#define RUBY_RELEASE_DAY 17
+#define RUBY_RELEASE_DAY 19
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];