[BUG] Vapoursynth stopped working in latest dev build (crashes)

[Selur]

2021.04.15.1 (no crash in vsViewer or output):

-> don't care

HybridDebugOutput_20210525

-> seems like DGDecNV has a problem with your buggy source file.
As a workaround you could do the following:
a. replace the DGDecode.dll and DGIndex.exe in Hybrid\64bit\vsfilters\SourceFilter\d2vSource with the 64bit version you linked to.
b. disable DGDecNV (Filtering->Vapoursynth->Source->Use DGDecNV when available)
c. report the issue to DG

Since I have no problem indexing the source DGDecNV (DGDecNV&DGIndex 2053.0.0.228), it might be an issue with your NVIDIA drivers.
Deinstalling them completely and making a clean reinstall might help.

Cu Selur