Fix issue where tasks weren't being dereferenced

Author: Jamie-Chang

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "aiointerpreters"
-version = "0.3.0"
+version = "0.4.0"
 description = "Run CPU bound code with subinterpreters using asyncio."
 readme = "README.md"
 authors = [

src/aiointerpreters/runner.py

@@ -106,12 +106,12 @@ def _coordinator(self) -> None:
                     # Interpreter closed
                     workers -= 1
                 case int(i), False, str(reason):
-                    future, loop = self._futures[i]
+                    future, loop = self._futures.pop(i)
                     loop.call_soon_threadsafe(
                         future.set_exception, InterpreterError(reason)
                     )
                 case int(i), True, result:
-                    future, loop = self._futures[i]
+                    future, loop = self._futures.pop(i)
                     loop.call_soon_threadsafe(future.set_result, result)
                 case other:
                     raise InterpreterError("Unexpected queue value: ", other)