[Haskell-cafe] Prelude.undefined

[Tom Hawkins]

On Wed, Mar 3, 2010 at 6:11 AM, Tom Hawkins <tomahawkins at gmail.com> wrote:
> On Wed, Mar 3, 2010 at 6:07 AM, Ivan Miljenovic
> <ivan.miljenovic at gmail.com> wrote:
>> On 3 March 2010 16:06, Tom Hawkins <tomahawkins at gmail.com> wrote:
>>> How do I track down an reference to an undefined value?  My program
>>> must not be using a library correctly because the program makes no
>>> direct use of 'undefined'.  Running with +RTS -xc yields:
>>>
>>> <GHC.Err.CAF>Test: Prelude.undefined
>>
>> Are you matching all patterns?  When compiling with -Wall does it make
>> any complaints?
>
> -Wall only complains about shadow bindings, defined but not used, and
> no type signature.  But no unmatched patterns.

BTW, I'm using:

GHC 6.12.1
bytestring 0.9.1.5
containers 0.3.0.0