# \[Bug:trunk\] Vector can't be coerced into Vector

**URL:** <https://www.ruby-forum.com/t/bug-trunk-vector-cant-be-coerced-into-vector/182240>\
**Category:** Development\
**Created:** [January 25, 2010, 4:23pm UTC](https://www.ruby-forum.com/t/bug-trunk-vector-cant-be-coerced-into-vector/182240 "2010-01-25T16:23:22Z")\
**Posts on this page:** 4\
**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:** [January 25, 2010, 4:23pm UTC](https://www.ruby-forum.com/t/bug-trunk-vector-cant-be-coerced-into-vector/182240/1 "2010-01-25T16:23:22Z")

</div>

e$B1sF#$G$9!#e(B

Vector e$B$Ke(B Vector e$B$r$+$1$k$He(B Vector can’t be coerced into  
Vector e$B$H$$$&e(B  
e$BNc30$,=P$^$9!#e(B

$ ./ruby -rmatrix -e ‘Vector[1, 2, 3] \* Vector[4, 5, 6]’  
/home/mame/work/ruby/lib/ruby/1.9.1/matrix.rb:1344:in `coerce': Vector can't be coerced into Vector (TypeError) from /home/mame/work/ruby/lib/ruby/1.9.1/matrix.rb:1218:in`\*’  
from -e:1:in `’

Vector e$B$Ke(B Vector  
e$B$O$+$1$i$l$J$$$N$GNc30$K$J$k$N$OEvA3$G$9$,!"%a%C%;!\<%8$,e(B  
e$B$o$+$j$K$/$$$H;W$$$^$9!#e(B

— a/lib/matrix.rb  
+++ b/lib/matrix.rb  
@@ -1214,6 +1209,8 @@ class Vector  
Vector.elements(els, false)  
when Matrix  
Matrix.column\_vector(self) \* x

- when Vector
- 

```
 Vector.Raise WrongArgType, x.class, "Numeric or Matrix"

```

else  
s, x = x.coerce(self)  
s \* x

---

<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:** [January 27, 2010, 9:29am UTC](https://www.ruby-forum.com/t/bug-trunk-vector-cant-be-coerced-into-vector/182240/2 "2010-01-27T09:29:44Z")

</div>

e$B$1$$$8$e!w$$$7$D$+$G$9e(B.

In [ruby-dev:40150] the message: “[ruby-dev:40150] [Bug:trunk] Vector  
can’t be coerced into Vector”, on Jan/26 00:22(JST)  
Yusuke ENDOH writes:

> Vector e$B$Ke(B Vector e$B$O$+$1$i$l$J$$$N$GNc30$K$J$k$N$OEvA3$G$9$,!"%a%C%;!\<%8$,e(B  
> e$B$o$+$j$K$/$$$H;W$$$^$9!#e(B

e$B$\*$C$7$c$kDL$j$G$9e(B.

\_\_  
----------------------------------------------------\>\> e$B@PDMe(B  
e$B7=\<ye(B \<\<—  
----------------------------------\>\> e-mail: removed\_email\_address@domain.invalid \<\<—

---

<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:** [January 27, 2010, 9:44am UTC](https://www.ruby-forum.com/t/bug-trunk-vector-cant-be-coerced-into-vector/182240/3 "2010-01-27T09:44:56Z")

</div>

e$B:XF#$H?=$7$^$9!#e(B

On Tue, 26 Jan 2010 00:22:54 +0900  
Yusuke ENDOH [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> ```
> s * x
> 
> ```

e$B$3$l$@$H\<B:]$KNc30$,\>e$,$C$?;~$K!"e(BNumerice$B$+e(BMatrixe$B$,e(B  
e$B!&EO$5$l$?$+$i%(%i!\<$J$N$+e(B  
e$B!&EO$5$l$J$+$C$?$+$i%(%i!\<$J$N$+e(B  
e$BJ,$+$i$J$$$H;W$&$N$G!“e(B"should be” e$B$H$+e(B “needed”  
e$B$H$+$r$D$1$?J}$,?F@Z$@$H;W$$$^$9!#e(B

---

<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:** [January 27, 2010, 3:38pm UTC](https://www.ruby-forum.com/t/bug-trunk-vector-cant-be-coerced-into-vector/182240/4 "2010-01-27T15:38:33Z")

</div>

e$B%A%1%C%He(B #2649 e$B$,99?7$5$l$^$7$?!#e(B (by Keiju Ishitsuka)

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

This issue was solved with changeset r26448.  
Yusuke, thank you for reporting this issue.  
Your contribution to Ruby is greatly appreciated.  
May Ruby be with you.

* * *

[http://redmine.ruby-lang.org/issues/show/2649](http://redmine.ruby-lang.org/issues/show/2649)