* bignum.c (big2str_orig): access beyond memory region cause crash

  on interrupt.  a patch from Yusuke ENDOH <mame AT tsg.ne.jp> in 
  [ruby-dev:32651].  [ruby-dev:32641]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14350 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/bignum.c b/bignum.c
index 8e2ae98bcd..39afad90c5 100644
--- a/bignum.c
+++ b/bignum.c
@@ -837,12 +837,12 @@ big2str_orig(VALUE x, int base, char* ptr, long len, long hbase, int trim)
         while (k--) {
             ptr[--j] = ruby_digitmap[num % base];
             num /= base;
-            if (!trim && j <= 0) break;
+            if (j <= 0) break;
             if (trim && i == 0 && num == 0) break;
         }
     }
     if (trim) {
-        while (ptr[j] == '0') j++;
+        while (j < len && ptr[j] == '0') j++;
         MEMMOVE(ptr, ptr + j, char, len - j);
         len -= j;
     }