Merge branch 'singletonfix' of https://github.com/carsonmcdonald/mruby into carsonmcdonald-singletonfix

src/codegen.c

@@ -2331,6 +2331,7 @@ codegen(codegen_scope *s, node *tree, int val)
       genop(s, MKOP_ABx(OP_EXEC, cursp(), idx));
       if (val) {
         push();
+        push();
       }
     }
     break;

test/t/class.rb

@@ -258,3 +258,37 @@ assert('Class#inherited') do
 
   assert_equal(Baz, Foo.subclass_name)
 end
+
+assert('singleton tests') do
+  bar = String.new
+
+  baz = class << bar
+    def self.run_baz
+      200
+    end
+  end
+
+  assert_false baz.singleton_methods.include? :run_baz
+
+  assert_raise(NoMethodError, 'should raise NoMethodError') do
+    baz.run_baz
+  end
+
+  assert_raise(NoMethodError, 'should raise NoMethodError') do
+    bar.run_baz
+  end
+
+  baz = class << bar
+    def self.run_baz
+      300
+    end
+    self
+  end
+
+  assert_true baz.singleton_methods.include? :run_baz
+  assert_equal 300, baz.run_baz
+
+  assert_raise(NoMethodError, 'should raise NoMethodError') do
+    bar.run_baz
+  end
+end