retry tailcall optimization (#2529)

Sorry, f62f90367fc3bce6714e7c34cbd040e14e43fe07 is push miss.

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb
index 6a9e9601f4..2b18c4aa59 100644
--- a/test/ruby/test_optimization.rb
+++ b/test/ruby/test_optimization.rb
@@ -451,6 +451,21 @@ class TestRubyOptimization < Test::Unit::TestCase
     }
   end
 
+  def test_tailcall_not_to_grow_stack
+    bug16161 = '[ruby-core:94881]'
+
+    tailcall("#{<<-"begin;"}\n#{<<~"end;"}")
+    begin;
+      def foo(n)
+        return :ok if n < 1
+        foo(n - 1)
+      end
+    end;
+    assert_nothing_raised(SystemStackError, bug16161) do
+      assert_equal(:ok, foo(1_000_000), bug16161)
+    end
+  end
+
   class Bug10557
     def [](_)
       block_given?