should not ignore the rest of recursive constructs

* array.c (rb_ary_hash): should not ignore the rest of recursive
  constructs.
* hash.c (rb_hash_hash): ditto.
* range.c (range_hash): ditto.
* struct.c (rb_struct_hash): ditto.
* test/-ext-/test_recursion.rb (TestRecursion): separate from
  test/ruby/test_thread.rb.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43860 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/-ext-/test_recursion.rb

@@ -0,0 +1,36 @@
+# -*- coding: us-ascii -*-
+require 'test/unit'
+require_relative '../ruby/envutil'
+
+class TestRecursion < Test::Unit::TestCase
+  require '-test-/recursion'
+
+  def setup
+    @obj = Struct.new(:visited).new(false)
+    @obj.extend(Bug::Recursive)
+  end
+
+  def test_recursive
+    def @obj.doit
+      self.visited = true
+      exec_recursive(:doit)
+      raise "recursive"
+    end
+    assert_raise_with_message(RuntimeError, "recursive") {
+      @obj.exec_recursive(:doit)
+    }
+    assert(@obj.visited, "obj.hash was not called")
+  end
+
+  def test_recursive_outer
+    def @obj.doit
+      self.visited = true
+      exec_recursive_outer(:doit)
+      raise "recursive_outer should short circuit intermediate calls"
+    end
+    assert_nothing_raised {
+      @obj.exec_recursive_outer(:doit)
+    }
+    assert(@obj.visited, "obj.hash was not called")
+  end
+end