merge revision(s) 66736: [Backport #15511]

	ast.c: argument must be a string

	[ruby-core:90904] [Bug #15511]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@66827 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_ast.rb b/test/ruby/test_ast.rb
index 055567d574..23cd5618a0 100644
--- a/test/ruby/test_ast.rb
+++ b/test/ruby/test_ast.rb
@@ -134,6 +134,14 @@ class TestAst < Test::Unit::TestCase
     assert_raise(TypeError) {RubyVM::AbstractSyntaxTree::Node.allocate}
   end
 
+  def test_parse_argument_error
+    assert_raise(TypeError) {RubyVM::AbstractSyntaxTree.parse(0)}
+    assert_raise(TypeError) {RubyVM::AbstractSyntaxTree.parse(nil)}
+    assert_raise(TypeError) {RubyVM::AbstractSyntaxTree.parse(false)}
+    assert_raise(TypeError) {RubyVM::AbstractSyntaxTree.parse(true)}
+    assert_raise(TypeError) {RubyVM::AbstractSyntaxTree.parse(:foo)}
+  end
+
   def test_column_with_long_heredoc_identifier
     term = "A"*257
     ast = RubyVM::AbstractSyntaxTree.parse("<<-#{term}\n""ddddddd\n#{term}\n")