I will fork the compiler before I endure that degree of failure.

I'm +1 on offering the warning and very very -1 on including it in -Wall.

On Mar 18, 2017 6:19 PM, "Henning Thielemann" <lemming@henning-thielemann.de> wrote:

On Sat, 18 Mar 2017, Lana Black wrote:

On 18/03/17 19:49, Henning Thielemann wrote:

On Sat, 18 Mar 2017, Carter Schonwald wrote:

for what?

A warning if someone e.g. calls 'length (a,b)', or more generally, if
certain instances are used.

Please no. Many of us like our code Wall-clean while still being able to
write polymorphic functions.

Whether the warning is enabled by Wall is a different question.
Though I think it should.

https://ghc.haskell.org/trac/ghc/ticket/11796
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