fix uninitialized memory reference.

* compile.c (iseq_set_sequence): clear kwargs (in ci_entries) memory area.
  kwargs ci entries are initialized by compiler. However, sometimes these
  initializations are skipped because corresponding calls are eliminated
  by some optimizations (for example, `if true` syntax elimnates else code).


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb
index 40015c57dd..3ea867e8e1 100644
--- a/test/ruby/test_optimization.rb
+++ b/test/ruby/test_optimization.rb
@@ -647,4 +647,19 @@ class TestRubyOptimization < Test::Unit::TestCase
       eval "def foo; 1.times{|(a), &b| nil && a}; end"
     END
   end
+
+  def test_clear_unreachable_keyword_args
+    assert_separately [], <<-END
+      script =  <<-EOS
+        if true
+        else
+          foo(k1:1)
+        end
+      EOS
+      GC.stress = true
+      30.times{
+        RubyVM::InstructionSequence.compile(script)
+      }
+    END
+  end
 end