Issue #10373 has been updated by Usaku NAKAMURA.

Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED to 2.0.0: DONE, 2.1: REQUIRED

Backported into `ruby_2_0_0` at r47935.

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Bug #10373: add RB_GC_GUARD in rb_mod_define_method() (r47891)
https://bugs.ruby-lang.org/issues/10373#change-49452

* Author: Tomoyuki Chikanaga
* Status: Closed
* Priority: Normal
* Assignee: Nobuyoshi Nakada
* Category: core
* Target version: current: 2.2.0
* ruby -v: -
* Backport: 2.0.0: DONE, 2.1: REQUIRED
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This ticket is for backport management.

r47891 added RB_GC_GUARD() in rb_mod_define_method() to protect method entry (VALUE body which can be derived from rb_block_lambda()) from unexpected GC.
It seemsd `ruby_2_1` and `ruby_2_0_0` have similar potential problem.



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