Fix reporting of error back to HTTP client

mimic3_http/synthesis.py

@@ -1,4 +1,18 @@
-#!/usr/bin/env python3
+# Copyright 2022 Mycroft AI Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
 import argparse
 import asyncio
 import io
@@ -117,7 +131,7 @@ def do_synthesis_proc(args: argparse.Namespace, request_queue: Queue):
                     _LOGGER.exception("Error during inference")
 
                     # Signal error on main loop
-                    asyncio.get_event_loop().call_soon_threadsafe(
+                    item.loop.call_soon_threadsafe(
                         item.future.set_exception, e
                     )