Fix type declaration errors

Author: markshannon

Tools/cases_generator/generators_common.py

@@ -164,7 +164,7 @@ def deopt_if(
 
     exit_if = deopt_if
 
-    def goto_error(self, offset: int, label: str, storage: Storage) -> None:
+    def goto_error(self, offset: int, label: str, storage: Storage) -> str:
         if offset > 0:
             return f"goto pop_{offset}_{label};"
         if offset < 0:

Tools/cases_generator/tier2_generator.py

@@ -69,7 +69,7 @@ def __init__(self, out: CWriter):
         super().__init__(out)
         self._replacers["oparg"] = self.oparg
 
-    def goto_error(self, offset: int, label: str, storage: Storage) -> None:
+    def goto_error(self, offset: int, label: str, storage: Storage) -> str:
         # To do: Add jump targets for popping values.
         if offset != 0:
             storage.copy().flush(self.out)