proc.c: infect inspect result

* proc.c (method_inspect): the result should be infected by the
  object.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59083 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

proc.c

@@ -2524,6 +2524,7 @@ method_inspect(VALUE method)
 
     TypedData_Get_Struct(method, struct METHOD, &method_data_type, data);
     str = rb_str_buf_new2("#<");
+    OBJ_INFECT_RAW(str, method);
     s = rb_obj_classname(method);
     rb_str_buf_cat2(str, s);
     rb_str_buf_cat2(str, ": ");

test/ruby/test_method.rb

@@ -454,6 +454,9 @@ class TestMethod < Test::Unit::TestCase
     c3.class_eval { alias bar foo }
     m3 = c3.new.method(:bar)
     assert_equal("#<Method: #{c3.inspect}(#{c.inspect})#bar(foo)>", m3.inspect, bug7806)
+
+    m.taint
+    assert_predicate(m.inspect, :tainted?, "inspect result should be infected")
   end
 
   def test_callee_top_level