[Bug #20423] Disallow anonymous block within argument forwarding

2 files changed, 1 insertions, 9 deletions

diff --git a/test/ruby/test_compile_prism.rb b/test/ruby/test_compile_prism.rb
index eef909eb07..d13b150f93 100644
--- a/test/ruby/test_compile_prism.rb
+++ b/test/ruby/test_compile_prism.rb
@@ -1839,15 +1839,6 @@ end
 
         o.bar { :ok }
       RUBY
-
-      # Test anonymous block forwarding from argument forwarding
-      assert_prism_eval(<<~RUBY)
-        o = Object.new
-        def o.foo = yield
-        def o.bar(...) = foo(&)
-
-        o.bar { :ok }
-      RUBY
     end
 
     def test_BlockLocalVariableNode
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 7cc5e542a7..44162f06cb 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -190,6 +190,7 @@ class TestSyntax < Test::Unit::TestCase
     assert_syntax_error("def f(...); g(0, *); end", /no anonymous rest parameter/)
     assert_syntax_error("def f(...); g(**); end", /no anonymous keyword rest parameter/)
     assert_syntax_error("def f(...); g(x: 1, **); end", /no anonymous keyword rest parameter/)
+    assert_syntax_error("def f(...); g(&); end", /no anonymous block parameter/)
   end
 
   def test_newline_in_block_parameters