Bug #5012: Timeオブジェクト間で特異オブジェクトが共有される

• Status: Closed
• Assignee: kosaki (Motohiro KOSAKI)
• Target version: 1.9.3
• ruby -v: ruby 1.9.3dev (2011-07-10 trunk 32482) [x86_64-linux]

[ktsj (Kazuki Tsujimoto)]

=begin
辻本です。

Time#getlocalなどによって返されるTimeオブジェクトが、
レシーバと特異オブジェクトを共有してしまっています。

t0 = Time.now
class <<t0; end

t1 = t0.getlocal

def t0.m
0
end

p t0.m # => 0
p t1.m # => 0

以下のパッチでどうでしょうか。

diff --git a/time.c b/time.c
index 5dbf9b2..eb49ef2 100644
--- a/time.c
+++ b/time.c
@@ -3426,7 +3426,7 @@ time_init_copy(VALUE copy, VALUE time)
static VALUE
time_dup(VALUE time)
{

• VALUE dup = time_s_alloc(CLASS_OF(time));

• VALUE dup = time_s_alloc(rb_obj_class(time));
  time_init_copy(dup, time);
  return dup;
  }
  =end

[kosaki (Motohiro KOSAKI)]

• Target version set to 1.9.3

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Assigned
• Assignee set to kosaki (Motohiro KOSAKI)

[kosaki (Motohiro KOSAKI)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r32554.
Kazuki, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• time.c (time_dup): used rb_obj_class() instead of CLASS_OF().
  The patch is made by Kazuki Tsujimoto. [Bug #5012] [ruby-dev:44071]

• test/ruby/test_time.rb (TestTime#test_getlocal_dont_share_eigenclass):
  added a new test for eigenclass of time object.

[kosaki (Motohiro KOSAKI)]

ありがとうございます。よさげに見えたので1.9.3ブランチにも入れてしまいました。