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-rw-r--r--searx/webapp.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/searx/webapp.py b/searx/webapp.py
index f81747325..371fb2a31 100644
--- a/searx/webapp.py
+++ b/searx/webapp.py
@@ -541,7 +541,8 @@ def index():
'corrections': list(result_container.corrections),
'infoboxes': result_container.infoboxes,
'suggestions': list(result_container.suggestions),
- 'unresponsive_engines': list(result_container.unresponsive_engines)}),
+ 'unresponsive_engines': list(result_container.unresponsive_engines)},
+ default=lambda item: list(item) if isinstance(item, set) else item),
mimetype='application/json')
elif output_format == 'csv':
csv = UnicodeWriter(StringIO())