6.0 update, toolbar not working: DEBUG: debug_toolbar.store.The debug toolbar can't serialize

[almazkun]

Dear contributors, hello and thank you for moving the project forward!

There is some issue with new db store and caching, I suppose.

Performing system checks...

System check identified no issues (0 silenced).
July 29, 2025 - 03:06:45
Django version 5.2.4, using settings 'settings.settings'
Starting development server at http://127.0.0.1:8000/
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[2025-07-29 03:06:52,948] DEBUG: debug_toolbar.store.The debug toolbar can't serialize <django.core.cache.backends.locmem.LocMemCache object at 0x109d60a50> into JSON
[2025-07-29 03:06:52,949] DEBUG: debug_toolbar.store.The debug toolbar can't serialize <django.core.cache.backends.locmem.LocMemCache object at 0x109d60a50> into JSON
[2025-07-29 03:06:52,949] DEBUG: debug_toolbar.store.The debug toolbar can't serialize <django.core.cache.backends.locmem.LocMemCache object at 0x109d60a50> into JSON
[2025-07-29 03:06:52,949] DEBUG: debug_toolbar.store.The debug toolbar can't serialize <django.core.cache.backends.locmem.LocMemCache object at 0x109d60a50> into JSON
[2025-07-29 03:06:52,949] DEBUG: debug_toolbar.store.The debug toolbar can't serialize <django.core.cache.backends.locmem.LocMemCache object at 0x109d60a50> into JSON
[2025-07-29 03:06:52,949] DEBUG: debug_toolbar.store.The debug toolbar can't serialize <django.core.cache.backends.locmem.LocMemCache object at 0x109d60a50> into JSON

MacOS
Python: 3.13
Django: 5.2.4
django-debug-toolbar: 6.0.0

Thank you and have a good one!

[tim-schilling]

Is this any type of caching or something specific? What extra context can you provide?

[prmH]

This is being reproduced with the value set in settings.py
CACHES = {"default": {"BACKEND": "django.core.cache.backends.locmem.LocMemCache"}}

[almazkun]

@tim-schilling
'django.core.cache.backends.filebased.FileBasedCache'
Django User object is stored in cache. It is not Json serializable, but I think it is pickled instead.