[PRISM] Define and use a pm_add_ensure_iseq

Prior to this commit, we were using `add_ensure_iseq` which compiled
a node as if it was a CRuby node. This commit defines
`pm_add_ensure_iseq` which compiles the Prism node appropriately.

1 files changed, 9 insertions, 0 deletions

diff --git a/test/ruby/test_compile_prism.rb b/test/ruby/test_compile_prism.rb
index 4b08d9eecc..e501efa6c9 100644
--- a/test/ruby/test_compile_prism.rb
+++ b/test/ruby/test_compile_prism.rb
@@ -847,6 +847,15 @@ module Prism
           end
         end
       CODE
+      assert_prism_eval(<<-CODE)
+        def self.prism_test_ensure_node
+          begin
+          ensure
+          end
+          return
+        end
+        prism_test_ensure_node
+      CODE
     end
 
     def test_NextNode