[GHC] #1171: GHC doesn't respect the imprecise exceptions semantics

[Simon Marlow]

Simon Marlow wrote:
>> The code in YHC is roughly "if some list is empty then error "No files
>> found"
>> else error "Many files found"". If this code were changed to the
>> equivalent
>> of "error (if some list is empty then "No files found" else "Many files
>> found")", would there still be circumstances where the actual output
>> produced could vary?
> 
> Maybe.  If GHC knows that error is strict (which it might well do) then you could be back where you started.

Oops, error isn't strict, never mind.

Cheers,
	Simon