check func_hash is defined before clearing (#5981)

holoviz · Dec 12, 2023 · 5395e31 · 5395e31
1 parent f88d3f7
commit 5395e31
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diff --git a/panel/io/cache.py b/panel/io/cache.py
@@ -433,6 +433,9 @@ def wrapped_func(*args, **kwargs):
 
     def clear(session_context=None):
         global func_hash
+        # clear called before anything is cached.
+        if 'func_hash' not in globals():
+            return
         if func_hash is None:
             return
         if to_disk:

diff --git a/panel/tests/io/test_cache.py b/panel/tests/io/test_cache.py
@@ -201,6 +201,13 @@ def test_cache_clear():
     fn.clear()
     assert fn(0, 0) == 1
 
+def test_cache_clear_before_cached():
+    # https://github.com/holoviz/panel/issues/5968
+    global OFFSET
+    OFFSET.clear()
+    fn = cache(function_with_args)
+    fn.clear()
+
 def test_per_session_cache(document):
     global OFFSET
     OFFSET.clear()