ast.c: argument must be a string

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

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66736 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ast.c

@@ -96,7 +96,7 @@ rb_ast_parse_str(VALUE str)
 {
     rb_ast_t *ast = 0;
 
-    str = rb_check_string_type(str);
+    StringValue(str);
     ast = rb_parser_compile_string_path(ast_parse_new(), Qnil, str, 1);
     return ast_parse_done(ast);
 }

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")