From fcda05dfc6a9d708c8f486695b88236fe9a8e9bc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=B2=20Balzarotti?= <nicolo.balzarotti@iit.it>
Date: Wed, 22 Feb 2023 04:17:14 +0100
Subject: [PATCH] eval scheme: fix few crashes caused by invalid json
 serialization

---
 app.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app.py b/app.py
index abc712d..415ace7 100644
--- a/app.py
+++ b/app.py
@@ -13,6 +13,7 @@ from sensors import sensors
 import phasectrl
 from time import perf_counter, sleep
 
+from scm import stringify
 
 def create_app():
     app = Flask('hakkoso')
@@ -91,7 +92,7 @@ def handle_new_client():
 @socketio.on('eval scheme')
 def eval_scheme(code):
     output = phasectrl.safe_eval(code, statemachine.env, notify=False)
-    socketio.emit('eval output', output)
+    socketio.emit('eval output', stringify(output, quote=False))
 
 @socketio.on('get sensors history')
 def send_sensors_history(elements=1000):