begin/ensure variable scope incorrect?

[Maccool]

if I execute the following code with mruby:

strX = 'some no foo'
begin
	y='start'
	puts y
	foo
rescue => excp
	strX = 'some foo error'
ensure
	puts strX
	puts 'end'
end
return

I get the output:

start
some foo error
end

Without the error line ( comment out 'foo') it's:
start
some no foo
end

In mod_mruby the scope of a variable is not carried into the ensure:

strX = 'some no foo'
begin
	y='start'
	Apache.echo y
	foo
rescue => excp
	strX = 'some foo error'
ensure
	Apache.echo strX
	Apache.echo 'end'
end
return

Output from this is:

start

end

The variable seen by the ensure is set to nil (tested by getting an error if you attempt " strX += 'more text' " or some other manipulation of the nil value string). This could be intentional, but I wanted to be sure that this was working as designed or a problem.