I've been lobbying on IRC to get precise source-path information
recorded with the default optimization settings, rather than just
top-level-form numbers. I think that Christophe and WHN have blessed
Now I just need to talk somebody into implementing it :-) so I humbly
suggest that it'd be a good thing.
My main interest is to make the (v)iew-source command in SLIME's
debugger show precise source forms when used on regular code.