# \[Bug:trunk\] SizedQueue can be pushed over its limit

**URL:** <https://www.ruby-forum.com/t/bug-trunk-sizedqueue-can-be-pushed-over-its-limit/161981>\
**Category:** Development\
**Created:** [March 4, 2009, 1:22pm UTC](https://www.ruby-forum.com/t/bug-trunk-sizedqueue-can-be-pushed-over-its-limit/161981 "2009-03-04T13:22:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [March 4, 2009, 1:22pm UTC](https://www.ruby-forum.com/t/bug-trunk-sizedqueue-can-be-pushed-over-its-limit/161981/1 "2009-03-04T13:22:10Z")

</div>

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SizedQueue e$B$N%j%\_%C%H$NH=Dj$,4V0c$C$F$$$^$9!#e(B

$ ./miniruby -rlib/thread -e ‘q = SizedQueue.new(2); q \<\< 1; q \<\< 1; q  
\<\< 1; p q’  
#\<SizedQueue:0x81f595c @max=2, @queue\_wait=[], @que=[1, 1, 1],  
@waiting=[], @mutex=#Mutex:0x81f590c\>

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# Index: lib/thread.rb

— lib/thread.rb (revision 22764)  
+++ lib/thread.rb (working copy)  
@@ -292,7 +292,7 @@  
t = nil  
@mutex.synchronize{  
while true

- 

```
   break if @que.length <= @max

```

- 

```
   break if @que.length < @max
   @queue_wait.push Thread.current
   @mutex.sleep
 end
```

---

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [March 4, 2009, 1:27pm UTC](https://www.ruby-forum.com/t/bug-trunk-sizedqueue-can-be-pushed-over-its-limit/161981/2 "2009-03-04T13:27:29Z")

</div>

e$B%A%1%C%He(B #1245 e$B$,99?7$5$l$^$7$?!#e(B (by Yusuke E.)

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## Applied in changeset r22765.

[http://redmine.ruby-lang.org/issues/show/1245](http://redmine.ruby-lang.org/issues/show/1245)