[ruby-core:83589] [Ruby trunk Bug#14061] Top-level return does not execute ensure if the file is loaded pr required

Issue #14061 has been reported by Eregon (Benoit Daloze).

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Bug #14061: Top-level return does not execute ensure if the file is loaded pr required
https://bugs.ruby-lang.org/issues/14061

* Author: Eregon (Benoit Daloze)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.0dev (2017-10-26 trunk 60450) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: REQUIRED
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While writing specs for top-level return in https://github.com/ruby/spec/pull/530,
we found an inconsistent behavior:

~~~ ruby
puts "before begin"
begin
  return
ensure
  puts "within ensure"
end
puts "after begin"
~~~

~~~
$ ruby test.rb
before begin
within ensure

$ ruby -r./test.rb -e0
before begin

$ ruby -e 'load "test.rb"'
before begin
~~~

This is inconsistent, I believe ensure should be executed in both cases.
The semantics of top-level return are like raising an exception implicitly caught by load/require and the top-level exception handler, except for this case.



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