* proc.c (proc_new): force to rewrite errinfo when calling Proc.new in ensure.

[Bug #5234] [ruby-core:39125]
  This code will be removed after changing throw mechanism (see r33064).

* vm.c (rb_vm_rewrite_dfp_in_errinfo): new function.

* vm.c (vm_make_env_each): changed accordingly.

* vm_core.h: ditto.

* bootstraptest/test_flow.rb: add tests for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33096 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bootstraptest/test_flow.rb

@@ -530,6 +530,19 @@ assert_equal %Q{ENSURE\n}, %q{
     end
   end
   e = Bug2729.new
+}],
+ ['[ruby-core:39125]', %q{
+  class Bug5234
+    include Enumerable
+    def each
+      begin
+        yield :foo
+      ensure
+        proc
+      end
+    end
+  end
+  e = Bug5234.new
 }]].each do |bug, src|
   assert_equal "foo", src + %q{e.detect {true}}, bug
   assert_equal "true", src + %q{e.any? {true}}, bug