Issue #11551 has been updated by Sean Griffin.


There is a typo in the `method_missing` definition which is the cause here. Changing `attribute_defintion` to `attribute_definition` fixes it, so the bug appears to have something to do with a `method_missing` invocation when it's defined this way.

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Bug #11551: Segfault for unidentified reasons
https://bugs.ruby-lang.org/issues/11551#change-54278

* Author: Sean Griffin
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-darwin14]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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The code changes https://github.com/sgrif/rails/commit/ddbed0040f5e99a751b130de8213f7cc7e0d155d cause a segfault when running the test case in `activemodel/test/cases/validations/acceptance_validations_test`. The code to reproduce is on that repo on the branch sg-segfault-example. The output from the crash is here: https://gist.github.com/sgrif/8775e4fa6b915868a893



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