Dav1d bug on MacBook

[codec2021]

Describe the bug
A clear and concise description of what the bug is.
When I use Dav1d to decode and analyze an av1 stream：

bugs appear in the code:

the stream I use is:https://www.elecard.com/storage/video/CityHall_640x360.webm

Version (please complete the following information):

• OS: MacBook 2.6 GHz Intel Core i7
• Version v.2.13-4-g3a209517

[ChristianFeldmann]

This may be related to #479 . I can not reproduce this currently. But it may also be something else.
Once the refactoring implementation is done, we can retry this and see if it is fixed.