# Error Using Bewildr Gem in V1.1.2

**URL:** <https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963>\
**Category:** IronRuby\
**Created:** [February 9, 2011, 7:51pm UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963 "2011-02-09T19:51:54Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\
**Post date:** [February 9, 2011, 7:51pm UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963/1 "2011-02-09T19:51:54Z")

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* * *

Ironruby-core mailing list  
removed\_email\_address@domain.invalid  
[http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core)

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**Author:** ![JonesS\_Larry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f9ae1b/32.png) [@JonesS\_Larry](https://www.ruby-forum.com/u/JonesS_Larry)\
**Post date:** [February 9, 2011, 8:00pm UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963/2 "2011-02-09T20:00:43Z")

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Hi Larry,

undefined method `flatten’ for {:name=\>“Modeling”}:Hash (NoMethodError)

> 

I can reproduce this here as well: [flatten.txt · GitHub](https://gist.github.com/819024)

My understanding is that Hash#flatten only exist on 1.9 and not on 1.8.

Is there a regression here maybe ?

– Thibaut

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<div class="post-metadata">

**Author:** ![JonesS\_Larry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f9ae1b/32.png) [@JonesS\_Larry](https://www.ruby-forum.com/u/JonesS_Larry)\
**Post date:** [February 9, 2011, 10:20pm UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963/3 "2011-02-09T22:20:44Z")

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One possible explanation is following: If you run the gem with IronRuby  
1.0 it runs in 1.8.6 compat mode. There may be a condition that checks  
for the RUBY\_VERSION in the gem. On Ruby 1.1.2 the RUBY\_VERSION is 1.9.2  
and thus some other code path might be executed that depends on  
Hash#flatten. I don’t think we regressed, it’s just a missing feature.  
Feel free to implement it and send a pull request.

Tomas

From: removed\_email\_address@domain.invalid  
[[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] On Behalf Of Thibaut Barrre  
Sent: Wednesday, February 09, 2011 11:00 AM  
To: removed\_email\_address@domain.invalid  
Subject: Re: [Ironruby-core] Error Using Bewildr Gem in V1.1.2

Hi Larry,  
undefined method `flatten’ for {:name=\>“Modeling”}:Hash (NoMethodError)

I can reproduce this here as well: [flatten.txt · GitHub](https://gist.github.com/819024)

My understanding is that Hash#flatten only exist on 1.9 and not on 1.8.

Is there a regression here maybe ?

– Thibaut

---

<div class="post-metadata">

**Author:** ![JonesS\_Larry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f9ae1b/32.png) [@JonesS\_Larry](https://www.ruby-forum.com/u/JonesS_Larry)\
**Post date:** [February 10, 2011, 10:33am UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963/4 "2011-02-10T10:33:25Z")

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Hi Thomas,

> One possible explanation is following: If you run the gem with IronRuby 1.0  
> it runs in 1.8.6 compat mode. There may be a condition that checks for the  
> RUBY\_VERSION in the gem. On Ruby 1.1.2 the RUBY\_VERSION is 1.9.2 and thus  
> some other code path might be executed that depends on Hash#flatten. I dont  
> think we regressed, its just a missing feature. Feel free to implement it  
> and send a pull request.

I’ll take this one, now that I’ve got the build working on Mac OS X.

I will ask you tips if I meet issues while running the test suite there.

– Thibaut

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<div class="post-metadata">

**Author:** ![JonesS\_Larry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f9ae1b/32.png) [@JonesS\_Larry](https://www.ruby-forum.com/u/JonesS_Larry)\
**Post date:** [February 10, 2011, 10:47pm UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963/5 "2011-02-10T22:47:50Z")

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Fixed! I’ve just pushed a new version of bewildr (0.1.11) to allow  
running under ironruby 1.1.1 and 1.1.2. You can read about the fix here:  
[http://www.natontesting.com/2011/02/10/bewildr-and-ironruby-1-1-2/](http://www.natontesting.com/2011/02/10/bewildr-and-ironruby-1-1-2/)

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<div class="post-metadata">

**Author:** ![JonesS\_Larry](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f9ae1b/32.png) [@JonesS\_Larry](https://www.ruby-forum.com/u/JonesS_Larry)\
**Post date:** [February 11, 2011, 12:04am UTC](https://www.ruby-forum.com/t/error-using-bewildr-gem-in-v1-1-2/202963/6 "2011-02-11T00:04:46Z")

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Thanks for the quick fix!

* * *

Larry J.  
||| Senior Level Development Engineer  
Aspen Technology, Inc. ||| +1 281-504-3324 ||| fax: 281-584-1062 |||

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