Fix pypy issue

coconut/compiler/compiler.py

@@ -2406,7 +2406,7 @@ def split_docstring(self, block):
                 return first_line, rest_of_lines
         return None, block
 
-    def tre_return_handle(self, func_name, func_args, func_store, mock_var, loc, tokens):
+    def tre_return_handle(self, func_name, func_args, func_store, mock_var, original, loc, tokens):
         """Handler for tre_return_grammar."""
         args = ", ".join(tokens)
 
@@ -2446,6 +2446,8 @@ def tre_return_handle(self, func_name, func_args, func_store, mock_var, loc, tok
             type_ignore=self.type_ignore_comment(),
         )
 
+    tre_return_handle.trim_arity = False  # fixes pypy issue
+
     def tre_return_grammar(self, func_name, func_args, func_store, mock_var=None):
         """Generate grammar element that matches a string which is just a TRE return statement."""
         self.tre_func_name <<= base_keyword(func_name).suppress()

coconut/compiler/util.py

@@ -751,6 +751,8 @@ def cached_parse(
     # only iterate over keys, not items, so we don't mark everything as alive
     for key in computation_graph_cache:
         prefix, is_at_end = key
+        if DEVELOP:  # avoid overhead
+            internal_assert(cache_prefixes or is_at_end, "invalid computation graph cache item", key)
         # the assumption here is that if the prior parse didn't make it to the end,
         #  then we can freely change the text after the end of where it made it,
         #  but if it did make it to the end, then we can't add more text after that