# \[Bug:1.9\] sleep and Thread#run

**URL:** <https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215>\
**Category:** Development\
**Created:** [July 16, 2008, 1:48pm UTC](https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215 "2008-07-16T13:48:33Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [July 16, 2008, 1:48pm UTC](https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215/1 "2008-07-16T13:48:33Z")

</div>

1.9 e$B$G$Oe(B sleep e$B$G?2$F$$$k%9%l%C%I$re(B Thread#run  
e$B$G5/$3$;$J$$e(B  
e$B$h$&$G$9!#e(B

% ./ruby -ve ’  
t = Thread.new {  
t1 = Time.now  
sleep 5  
t2 = Time.now  
p t2 - t1  
}  
sleep 1  
t.run  
t.join  
’  
ruby 1.9.0 (2008-07-16 revision 18083) [i686-linux]  
5.139447392

sleep e$B$re(B Thread#run e$B$G5/$3$;$k$C$]$$$3$H$Oe(B rdoc  
e$B$K=q$$$F$"$j$^e(B  
e$B$9!#e(B

- Suspends the current thread for _duration_ seconds (which may be any  
number,
- including a +Float+ with fractional seconds). Returns the actual  
number of
- seconds slept (rounded), which may be less than that asked for if  
another
- thread calls `Thread#run`. Zero arguments causes +sleep+  
to sleep
- forever.

e$B$^$?!"e(B1.8 e$B$G$O5/$3$;$^$9!#e(B

% ruby-1.8 -ve ’  
t = Thread.new {  
t1 = Time.now  
sleep 5  
t2 = Time.now  
p t2 - t1  
}  
sleep 1  
t.run  
t.join  
’  
ruby 1.8.7 (2008-07-10 revision 17572) [i686-linux]  
1.002687

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [July 16, 2008, 6:05pm UTC](https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215/2 "2008-07-16T18:05:36Z")

</div>

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:35542] [Bug:1.9] sleep and Thread#run”  
on Wed, 16 Jul 2008 20:43:16 +0900, Tanaka A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
writes:

|1.9 e$B$G$Oe(B sleep e$B$G?2$F$$$k%9%l%C%I$re(B Thread#run e$B$G5/$3$;$J$$e(B  
|e$B$h$&$G$9!#e(B

|sleep e$B$re(B Thread#run e$B$G5/$3$;$k$C$]$$$3$H$Oe(B rdoc e$B$K=q$$$F$"$j$^e(B  
|e$B$9!#e(B

1.8e$B$H$Oe(BThreade$B$N\<BAu$,0c$&$N$G!“$J$s$i$+$N;v\>p$Ge(B1.9e$B$O5/$3$;$Je(B  
e$B$$$N$G$”$C$F$b\<u$1F~$l$i$l$^$9!#$?$@$7!"$=$N\>l9g$Oe(Brdoce$B$O99?7e(B  
e$B$9$Y$-$G$7$g$&$M!#e(B

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [July 17, 2008, 5:59am UTC](https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215/3 "2008-07-17T05:59:00Z")

</div>

In article [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid),  
Yukihiro M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

> 1.8e$B$H$Oe(BThreade$B$N\<BAu$,0c$&$N$G!“$J$s$i$+$N;v\>p$Ge(B1.9e$B$O5/$3$;$Je(B  
> e$B$$$N$G$”$C$F$b\<u$1F~$l$i$l$^$9!#$?$@$7!"$=$N\>l9g$Oe(Brdoce$B$O99?7e(B  
> e$B$9$Y$-$G$7$g$&$M!#e(B

e$B$Y$D$K\<B:]$K;H$C$F$$$F$H$$$&OC$G$O$J$/$F!"$^$?!“e(Bsleep e$B$9$kA0e(B  
e$B$Ke(B run  
e$B$7$A$c$C$?$i!”$H$$$&?4G[$bM-$k$N$G$=$l$+$^$$$^$;$s$,!"e(B  
e$BB\>$N%9%l%C%I$+$iDLCN$5$l$k$+0lDj;~4V7P2a$9$k$+$I$A$i$+$rBT$D!"e(B  
e$B$H$$$&$N$Oe(B 1.9 e$B$G$O$I$N$h$&$K=q$/$N$G$7$g$&e(B?

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [July 17, 2008, 7:43am UTC](https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215/4 "2008-07-17T07:43:45Z")

</div>

e$B$J$+$@$G$9!#e(B

At Thu, 17 Jul 2008 00:28:55 +0900,  
Yukihiro M. wrote in [ruby-dev:35549]:

> 1.8e$B$H$Oe(BThreade$B$N\<BAu$,0c$&$N$G!"$J$s$i$+$N;v\>p$Ge(B1.9e$B$O5/$3$;$Je(B  
> e$B$$$N$G$"$C$F$b\<u$1F~$l$i$l$^$9!#$?$@$7!"$=$N\>l9g$Oe(Brdoce$B$O99?7e(B  
> e$B$9$Y$-$G$7$g$&$M!#e(B

[ruby-core:17270]e$B$rD\>$7$?$H$-$N%P%0$G$9!#e(B

# [ruby-dev:35542]e$B$,e(Bredminee$B$KEPO?$5$l$F$J$$$G$9$M!#e(B

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [July 27, 2008, 2:11am UTC](https://www.ruby-forum.com/t/bug-1-9-sleep-and-thread-run/143215/5 "2008-07-27T02:11:24Z")

</div>

e$B%A%1%C%He(B #289 e$B$,99?7$5$l$^$7$?!#e(B (by Koichi Sasada)

## fixed at r18094.

[http://redmine.ruby-lang.org/issues/show/289](http://redmine.ruby-lang.org/issues/show/289)