Help find problematic file with error 'Failed to seek to offset'

[richelbilderbeek]

Dear VarTrix maintainers,

I try to help out a user that has the error Failed to seek to offset when running VarTrix, I am happy VarTrix nicely reports the error, yet I feel it could be even better, by mentioning in which file this error occurs, for example: Failed to seek to offset in file '[filename]'.

The error is produced by htslib in files here and here. Those functions -as far as I understand- do not know what is the name of the file.

Luckily, VarTrix can do better!

My suggestion is that when htslib is called to read a file, that the VarTrix error message adds the filename to the error message.

In that way, VarTrix users can easier diagnose their errors.

I volunteer to add this by a Pull Request if this suggestion is accepted and when requested to do so 👍

For the full error details (if needed), see the user support ticket at https://github.com/UPPMAX/ticket_296259.