Feature request: One VCD file on error about sby

[dlmiles]

I run into this code/build/test loop headache too and problems amplify on Windows (compared to Linux) with file/directory locking of open file/dir handles.

I would agree with the concept of a unified output directory collecting and copying failures together (not with the moving of files from their original source), maybe with a new option --collect-failure-output=failures to create a failures/* tree.
Also agree if useful concatenation of VCD files into one large file (with added signals to indicate original file name, test kind and a strobe signal at point of the failure claim) , so its possible to seek next rising edge in tooling.
Also a summary of the failure claim, in a format an IDE/tooling can parse to obtains error message and accompanying VCD proof with time index, then popup or inter-communicate with gtkwave to open and seek. This aspect would be for tooling to implemented IDE/VSCODE/gtkwave.

But the 'gtkwave struggles' would be better improved at the gtkwave end IMHO.