[Haskell-cafe] Prelude.undefined

[Alex MDC]

2010/3/3 Tom Hawkins <tomahawkins at gmail.com>

> On Wed, Mar 3, 2010 at 6:07 AM, Ivan Miljenovic
>
> -Wall only complains about shadow bindings, defined but not used, and
> no type signature.  But no unmatched patterns.
>

If you can run your code through the ghc debugger you can get it to break
when an undefined exception is raised.

The options are :set -fbreak-on-exception or -fbreak-on-error. More info in
the documentation at
http://www.haskell.org/ghc/docs/latest/html/users_guide/ghci-debugger.html#ghci-debugger-exceptions

Hope that helps,
Alex MDC
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