# \[Bug #601\] an instance of Bignum can have singleton methods

**URL:** <https://www.ruby-forum.com/t/bug-601-an-instance-of-bignum-can-have-singleton-methods/149505>\
**Category:** Development\
**Created:** [September 25, 2008, 3:11pm UTC](https://www.ruby-forum.com/t/bug-601-an-instance-of-bignum-can-have-singleton-methods/149505 "2008-09-25T15:11:12Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yuki\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/a6a055/32.png) [@Yuki\_S](https://www.ruby-forum.com/u/Yuki_S)\
**Post date:** [September 25, 2008, 3:11pm UTC](https://www.ruby-forum.com/t/bug-601-an-instance-of-bignum-can-have-singleton-methods/149505/1 "2008-09-25T15:11:12Z")

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Bug #601: an instance of Bignum can have singleton methods  
[http://redmine.ruby-lang.org/issues/show/601](http://redmine.ruby-lang.org/issues/show/601)

e$B5/I\<\<Te(B: Yuki S.  
e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
e$B%+%F%4%je(B: core

Bignume$B$N%$%s%9%?%s%9$,FC0[%a%=%C%I$r;}$F$k$h$&$G$9!#e(B

$ ruby19 -e ‘x = (1 \<\< 64); begin; def x.foo; p 1; end; rescue; end;  
x.foo’  
#=\> 1  
(by mamee$B$5$se(B)

e$B8=:\_$N!Ve(BFixnume$B$KBP$9$k0l4S@-e(B +  
e$B$I$&$;C/$b;H$o$J$$!W$H$$$&@\_7W0U?^$+$i$9$l$PFC0[%/%i%9$r:n$m$&$H$9$k;~E@$Ge(BTypeErrore$B$K$J$k$Y$-$G$O$J$$$G$7$g$&$+!#e(B

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<div class="post-metadata">

**Author:** ![Yuki\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/a6a055/32.png) [@Yuki\_S](https://www.ruby-forum.com/u/Yuki_S)\
**Post date:** [October 18, 2008, 12:12pm UTC](https://www.ruby-forum.com/t/bug-601-an-instance-of-bignum-can-have-singleton-methods/149505/2 "2008-10-18T12:12:53Z")

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

In message “Re: [ruby-dev:36569] [Bug #601] an instance of Bignum can  
have singleton methods”  
on Thu, 25 Sep 2008 22:10:30 +0900, Yuki S.  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

|Bignume$B$N%$%s%9%?%s%9$,FC0[%a%=%C%I$r;}$F$k$h$&$G$9!#e(B

e$B0l1~!"Nc30$,=P$k$s$G$9$1$I!#e(B

| $ ruby19 -e ‘x = (1 \<\< 64); begin; def x.foo; p 1; end; rescue; end; x.foo’  
| #=\> 1  
|(by mamee$B$5$se(B)

e$B$3$N%1!\<%9$G$O$o$6$o$6JdB-$7$F$^$9$+$i$M$(!#e(B

|e$B8=:\_$N!Ve(BFixnume$B$KBP$9$k0l4S@-e(B + e$B$I$&$;C/$b;H$o$J$$!W$H$$$&@\_7W0U?^$+$i$9$l$PFC0[%/%i%9$r:n$m$&$H$9$k;~E@$Ge(BTypeErrore$B$K$J$k$Y$-$G$O$J$$$G$7$g$&$+!#e(B

e$B$$$A$$$A!“FC0[%/%i%9$r:n$k;~E@$Ge(BNumerice$B$N%5%V%/%i%9$+$I$&$+e(B  
e$B%A%'%C%/$9$k$N$O%3%9%H$,A}2C$9$k$N$G$”$^$j$&$l$7$/$J$$$N$G!"e(B  
singleton\_method\_addede$B$NCf$GDj5A$5$l$?%a%=%C%I$r:o=|$9$k$3$He(B  
e$B$K$7$^$9!#$b$A$m$s!“e(Bsingleton\_method\_addede$B$re(Bundefe$B$9$l$PDj5Ae(B  
e$B$G$-$k$h$&$K$J$C$F$7$^$&$o$1$G$9$,!”$=$3$^$G$OLLE]$\_$-$l$J$$e(B  
e$B$H;W$$$^$9!#e(B

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<div class="post-metadata">

**Author:** ![Yuki\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/a6a055/32.png) [@Yuki\_S](https://www.ruby-forum.com/u/Yuki_S)\
**Post date:** [October 18, 2008, 12:47pm UTC](https://www.ruby-forum.com/t/bug-601-an-instance-of-bignum-can-have-singleton-methods/149505/3 "2008-10-18T12:47:26Z")

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e$B%A%1%C%He(B #601 e$B$,99?7$5$l$^$7$?!#e(B (by Yukihiro M.)

e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B  
e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B

## Applied in changeset r19835.

[http://redmine.ruby-lang.org/issues/show/601](http://redmine.ruby-lang.org/issues/show/601)