* Francois Pottier:

> What about non-toy projects? Are there times where the automatic error
> recovery mechanism gets in the way?

AFAIK, MLton uses it, and the inserted symbols are often not those
that are actually missing.  This leads to error messages which are
rather confusing.  With manually written error handling, you can
surely do much better, but the effort pays off in special cases.
(Most of the time, the careful error handling code is never written,
of course.)