allow method definition in cmdarg

save cmdarg_stack and isolate command argument state from outer scope
to allow method definition in cmdarg

import from ruby/ruby@04bb9d6b75a55d4000700769eead5a5cb942c25b

1 files changed, 7 insertions, 0 deletions

diff --git a/test/t/syntax.rb b/test/t/syntax.rb
index d761b1991..2adfbc8ab 100644
--- a/test/t/syntax.rb
+++ b/test/t/syntax.rb
@@ -265,3 +265,10 @@ assert('parenthesed do-block in cmdarg') do
   result = x.test (proc do :ok; end)
   assert_equal :ok, result
 end
+
+assert('method definition in cmdarg') do
+  if false
+    bar def foo; self.each do end end
+  end
+  true
+end