[Haskell-cafe] Prelude.head: empty list

[Kostiantyn Rybnikov]

Always using `headNote` from `safe` package works good enough usually.

On Fri, Mar 11, 2016 at 5:56 PM, Han Joosten <han.joosten.han at gmail.com>
wrote:

> In a rather large program I made some changes, and now I get the runtime
> error:
>
> ampersand.exe: Prelude.head: empty list
>
> Of course I know that head is partial, and should be used with care. It is
> used many times (we have 100+ modules in the program). Is there an elegant
> way to get some information about where the specific call to head is being
> made?
>
> Thanks!
>
>
>
>
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