Merge pull request #3324 from bouk/mruby/bouk-negate

Don't generate code for NODE_NEGATE if the result isn't used
Reported by https://hackerone.com/haquaman

1 files changed, 10 insertions, 0 deletions

diff --git a/test/t/codegen.rb b/test/t/codegen.rb
index 528f58d9e..709902741 100644
--- a/test/t/codegen.rb
+++ b/test/t/codegen.rb
@@ -81,3 +81,13 @@ assert('next in normal loop with 127 arguments') do
     end
   end
 end
+
+assert('negate literal register alignment') do
+  a = *case
+  when 0
+    -0.0
+    2
+  end
+
+  assert_equal [2], a
+end