# \[Bug #3568\] /(?\<=a).\*b/ =~ "aab" doesn't match

**URL:** <https://www.ruby-forum.com/t/bug-3568-a-b-aab-doesnt-match/191542>\
**Category:** Development\
**Created:** [July 14, 2010, 5:10am UTC](https://www.ruby-forum.com/t/bug-3568-a-b-aab-doesnt-match/191542 "2010-07-14T05:10:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Yui\_NARUSE](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/8edcca/32.png) [@Yui\_NARUSE](https://www.ruby-forum.com/u/Yui_NARUSE)\
**Post date:** [July 14, 2010, 5:10am UTC](https://www.ruby-forum.com/t/bug-3568-a-b-aab-doesnt-match/191542/1 "2010-07-14T05:10:11Z")

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Bug #3568: /(?\<=a).\*b/ =~ “aab” doesn’t match  
[http://redmine.ruby-lang.org/issues/show/3568](http://redmine.ruby-lang.org/issues/show/3568)

e$B5/I\<\<Te(B: Yui NARUSE  
e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
e$BC4Ev\<Te(B: Yui NARUSE, e$B%+%F%4%je(B: core, Target version: 1.9.2  
ruby -v: ruby 1.9.3dev (2010-07-13 trunk 28624) [x86\_64-freebsd8.1]

[http://pc12.2ch.net/test/read.cgi/tech/1272248179/735](http://pc12.2ch.net/test/read.cgi/tech/1272248179/735)

---

<div class="post-metadata">

**Author:** ![Yui\_NARUSE](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/8edcca/32.png) [@Yui\_NARUSE](https://www.ruby-forum.com/u/Yui_NARUSE)\
**Post date:** [July 15, 2010, 8:57am UTC](https://www.ruby-forum.com/t/bug-3568-a-b-aab-doesnt-match/191542/2 "2010-07-15T08:57:15Z")

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e$B%A%1%C%He(B #3568 e$B$,99?7$5$l$^$7$?!#e(B (by Yui NARUSE)

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 r28648.  
Yui, 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/3568](http://redmine.ruby-lang.org/issues/show/3568)