From abc20ed0f4b0067ad912f345245161426d331ed8 Mon Sep 17 00:00:00 2001
From: wanabe <wanabe@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 20 Jul 2009 03:53:19 +0000
Subject: [PATCH] * lib/matrix.rb (Matrix#rank): revert a part of r20859 to
 avoid   infinite loop.  [Bug #1020]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24211 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog     | 5 +++++
 lib/matrix.rb | 5 ++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index bc2d0cb4dd..738e08e63d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Jul 20 12:51:39 2009  wanabe  <s.wanabe@gmail.com>
+
+	* lib/matrix.rb (Matrix#rank): revert a part of r20859 to avoid
+	  infinite loop.  [Bug #1020]
+
 Mon Jul 20 11:12:54 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in, Makefile.in (TEST_RUNNABLE): tests are no
diff --git a/lib/matrix.rb b/lib/matrix.rb
index 5d350bb8f8..95c8273522 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -770,7 +770,7 @@ class Matrix
     end
     rank = 0
     k = 0
-    loop do
+    begin
       if (akk = a[k][k]) == 0
         i = k
         exists = true
@@ -812,8 +812,7 @@ class Matrix
         end
       end
       rank += 1
-      break unless (k += 1) <= a_column_size - 1
-    end
+    end while (k += 1) <= a_column_size - 1
     return rank
   end