[ruby-dev:37979] [Bug #1150] calling instance_eval in extended library cause exception

Bug #1150: calling instance_eval in extended library cause exception
http://redmine.ruby-lang.org/issues/show/1150

起票者: Akio Tajima
ステータス: Open, 優先度: Normal
Target version: 1.9.1
ruby -v: ruby 1.9.1p0 (2009-01-30 revision 21907) [i386-mswin32]

拡張ライブラリ内のメソッドでinstance_evalを呼び出すと、Can't eval on top of Fiber or Thread (RuntimeError)になります。
再現コードを以下に示します。
// cmodev.c
#include "ruby.h"
#include "extconf.h"
static VALUE cmodev;
static VALUE xtest_func(VALUE self, VALUE s)
{
    return rb_funcall2(self, rb_intern("instance_eval"), 1, &s);
}
void Init_cmodev()
{
    cmodev = rb_define_class("XTest", rb_cObject);
    rb_define_method(cmodev, "xtest", xtest_func, 1);    
}

#t.rb
require 'cmodev'
x = XTest.new
x.xtest("puts 'hello'")

実行例
c:\test\modev\test>ruby t.rb
t.rb:3:in `instance_eval': Can't eval on top of Fiber or Thread (RuntimeError)
        from t.rb:3:in `xtest'
        from t.rb:3:in `<main>'


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