merge revision(s) bc002971b6ad483dbf69b8a275c44412bb6ab954: [Backport #20094]

	[Bug #20094] Distinguish `begin` and parentheses

	---
	 compile.c                    |  1 +
	 parse.y                      | 36 +++++++++++++++++++++---------------
	 test/ruby/test_whileuntil.rb | 18 ++++++++++++++++++
	 3 files changed, 40 insertions(+), 15 deletions(-)

1 files changed, 18 insertions, 0 deletions

diff --git a/test/ruby/test_whileuntil.rb b/test/ruby/test_whileuntil.rb
index 121c44817d..ff6d29ac4a 100644
--- a/test/ruby/test_whileuntil.rb
+++ b/test/ruby/test_whileuntil.rb
@@ -73,6 +73,24 @@ class TestWhileuntil < Test::Unit::TestCase
     }
   end
 
+  def test_begin_while
+    i = 0
+    sum = 0
+    begin
+      i += 1
+      sum += i
+    end while i < 10
+    assert_equal([10, 55], [i, sum])
+
+    i = 0
+    sum = 0
+    (
+      i += 1
+      sum += i
+    ) while false
+    assert_equal([0, 0], [i, sum])
+  end
+
   def test_until
     i = 0
     until i>4