Can \barNumberCheck be set to error?

[thorne]

I am just wondering if there is any way to set only \barNumberCheck to
generate an error instead of a warning.

I am using a Makefile to handle a project.  I am using \barNumberCheck
on every bar on every part.  It is convenient to have Lilypond error
any time a bar number check fails so that the render fails and I know
right away.

I tried doing -dwarning-as-error, which works, but then makes the
render fail any time anything generates a warning, which is probably
not something I can have.

Or, is there a better approach in general?

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