symbol.h: unexpected safe call

* symbol.h (is_attrset_id): ASET is an attrset ID.  fix
  unexpected safe call instead of an ordinary ASET.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53485 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/test/ruby/test_call.rb b/test/ruby/test_call.rb
index 7ef8d06936..fb79eadb64 100644
--- a/test/ruby/test_call.rb
+++ b/test/ruby/test_call.rb
@@ -83,4 +83,11 @@ class TestCall < Test::Unit::TestCase
   def test_safe_call_block_call_command
     assert_nil(("a".sub! "b" do end&.foo 1 do end))
   end
+
+  def test_invalid_safe_call
+    h = nil
+    assert_raise(NoMethodError) {
+      h[:foo] = nil
+    }
+  end
 end