GHC infinite loop when building vector program

[Daniel Fischer]

On Tuesday 11 October 2011, 21:11:30, Bas van Dijk wrote:
> Hello,
> 
> When benchmarking my new vector-bytestring[1] package I discovered
> that building the following program causes GHC to go into, what seems
> to be, an infinite loop:
> 

> 
> I use vector-0.9 and ghc-7.2.1.

Replicated with vector-0.7.1 and ghc-7.2.1 (^C'ed after six minutes).
Compilation finishes (unsurprisingly) with -fno-spec-constr or with
{-# NOINLINE f #-}.

It compiles fine with vector-0.7.0.1 and ghc-7.0.4.

> 
> Regards,
> 
> Bas