[racket-dev] syntax-case and stack trace

This is a bug in errortrace that was introduced with the switch to
taints. I'm fixing it.

At Fri, 15 Jul 2011 16:27:57 -0500, Casey Klein wrote:
> Running the following program in DrRacket 5.1.1 highlights the `error'
> expression if debugging is enabled:
> 
> #lang racket
> 
> (syntax-case 'a ()
>   (_ (error 'boom)))
> 
> Running the same program in 4d7584d/g doesn't highlight anything.
> 
> Without the `syntax-case' around it, both versions highlight the
> `error' expression.
> 
> Is this a bug? If not, is there a reliable way to associate a source
> location with a runtime error?