* array.c (ary_shared_first): should create embedded copies

  instead of sharing memory region for smaller arrays.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@10941 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 7 insertions, 1 deletions

diff --git a/.cvsignore b/.cvsignore
index 5004a53b7..9709c87cb 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -34,6 +34,7 @@ newdate.rb
 newver.rb
 parse.c
 patches
+patches-master
 pitest.rb
 ppack
 preview
diff --git a/ChangeLog b/ChangeLog
index 516c08a23..43831ae93 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Sep 16 11:03:49 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* array.c (ary_shared_first): should create embedded copies
+	  instead of sharing memory region for smaller arrays.
+
 Sat Sep 16 09:37:39 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* struct.c (inspect_struct): do not display a class name for
diff --git a/array.c b/array.c
index cb3644837..d154bf35e 100644
--- a/array.c
+++ b/array.c
@@ -474,7 +474,7 @@ ary_shared_first(int argc, VALUE *argv, VALUE ary, int last)
     if (last) {
 	offset = RARRAY_LEN(ary) - n;
     }
-    if (ARY_EMBED_P(ary)) {
+    if (ARY_EMBED_P(ary) || n <= RARRAY_EMBED_LEN_MAX) {
 	return rb_ary_new4(n, RARRAY_PTR(ary)+offset);
     }
     else {