# $! assignment does not work properly

**URL:** <https://www.ruby-forum.com/t/assignment-does-not-work-properly/89716>\
**Category:** Development\
**Created:** [March 22, 2007, 8:52am UTC](https://www.ruby-forum.com/t/assignment-does-not-work-properly/89716 "2007-03-22T08:52:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yukihiro\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c57346/32.png) [@Yukihiro\_M](https://www.ruby-forum.com/u/Yukihiro_M)\
**Post date:** [March 22, 2007, 8:52am UTC](https://www.ruby-forum.com/t/assignment-does-not-work-properly/89716/1 "2007-03-22T08:52:47Z")

</div>

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

[ruby-core:10721]e$B$Ne(B

[ruby-Bugs-9451] Exception in Matrix inverse

e$B$G$9$,!"D\>@$N860x$Oe(B$!e$B$rBeF~$7$F$b$=$l$,H?1G$5$l$J$$e(B(e$B$N$G!“e(B  
$@e$B$X$N%”%/%;%9$,%(%i!\<$K$J$ke(B)e$B$H$$$&$b$N$G$7$?!#6qBNE\*$K$Oe(B  
errinfo\_settere$B$,e(B GET\_THREAD()-\>errinfo e$B$KBeF~$7$F$$$k$N$K!"e(B  
get\_errinfo()e$B$O$=$l$r;2\>H$;$:$K%3!\<%k%9%?%C%/$r%9%-%c%s$7$Fe(B  
e$B$$$k$h$&$G$9!#e(B

e$B%3!\<%k%9%?%C%/$N9=B$$,J,$+$i$J$$$N$G;d$K$O$3$3$^$G$G$7$?!#e(B  
get\_errinfo()e$B$N@hF,$Ke(B

```
 if (!NIL_P(th->errinfo)) return th->errinfo;

```

e$B$H$$$&%3!\<%I$rB-$9$H$H$j$"$($:$3$NLdBj$O2sHr$G$-$^$9$,!"$=$le(B  
e$B$,@5$7$$BP1~$+$I$&$+$O;d$K$OJ,$+$j$^$;$s!#e(B