Enumerable#all?: Stop optimizing when a given block is not optimizable

This is a follow up to 182822683f86c8f8d63b05765addf5a04d112aa2.

Co-Authored-By: Aaron Patterson <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index 7503e06272..237bdc8a4d 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -1348,4 +1348,12 @@ class TestEnumerable < Test::Unit::TestCase
     klass.new.grep(/(b.)/) { svars << $1 }
     assert_equal(["ba", "ba"], svars)
   end
+
+  def test_all_fast
+    data = { "key" => { "key2" => 1 } }
+    kk = vv = nil
+    data.all? { |(k, v)| kk, vv = k, v }
+    assert_equal(kk, "key")
+    assert_equal(vv, { "key2" => 1 })
+  end
 end