0.4.0 crash - due to stream being re-created by filter changes

[BrainDamage]

[mpv_thumbnail_script_client_osc] 
[mpv_thumbnail_script_client_osc] stack traceback:
[mpv_thumbnail_script_client_osc] 	[C]: in function 'max'
[mpv_thumbnail_script_client_osc] 	...nfig/mpv/scripts/mpv_thumbnail_script_client_osc.lua:853: in function 'on_thumb_progress'
[mpv_thumbnail_script_client_osc] 	...nfig/mpv/scripts/mpv_thumbnail_script_client_osc.lua:1046: in function 'handler'
[mpv_thumbnail_script_client_osc] 	mp.defaults:339: in function 'handler'
[mpv_thumbnail_script_client_osc] 	mp.defaults:458: in function 'call_event_handlers'
[mpv_thumbnail_script_client_osc] 	mp.defaults:495: in function 'dispatch_events'
[mpv_thumbnail_script_client_osc] 	mp.defaults:451: in function <mp.defaults:450>
[mpv_thumbnail_script_client_osc] 	[C]: ?
[mpv_thumbnail_script_client_osc] 	[C]: ?
[mpv_thumbnail_script_client_osc] Lua error: ...nfig/mpv/scripts/mpv_thumbnail_script_client_osc.lua:853: bad argument #1 to 'max' (number expected, got nil)

If it's any help, I was using a fuse virtual filesystem to hold the video that triggered the bug, the file was actually hosted remotely, perhaps the seek broke some assumptions?

[TheAMM]

For posterity, this happened because video-dec-params (which the script observes) changed due to the stream being re-opened by blur-edges.lua changing the filter chain.