[plt-scheme] Getting source positions in MzScheme error messages

Jim Blandy wrote:

> How can I get a source location along with my error message in an
> MzScheme script?

> I'm sure this is a FAQ, but the MzScheme folks seem to quite admirably
> forgo having a FAQ document in favor of having organized and current
> manuals.  I'm happy to read, but I've not found anything.

Actually, adding this line to the mzscheme --help message would be helpful:

     Use -M errortrace to get source location of errors.

-- 
Jens Axel Søgaard