ANNOUNCE: GHC version 7.2.1

Simon Marlow marlowsd at
Wed Nov 23 11:12:51 CET 2011

On 20/11/2011 21:29, Joachim Breitner wrote:
> Hi,
> Am Samstag, den 27.08.2011, 15:50 +0200 schrieb Karel Gardas:
>> On 08/27/11 03:29 PM, Joachim Breitner wrote:
>>> while better than rc1, there are still build failures on debian, on
>>> architectures mips, mipsel and s390, example excerpt from
>>> ghc-stage1: panic! (the 'impossible' happened)
>>>     (GHC version 7.2.1 for s390-ibm-linux):
>>> 	elfSectionNote ArchUnknown
>>> And similar for mipsel-unknown-linux and mips-unknown-linux.
>>> Could you make them known in the next release?
>> sorry for causing this bug. Simon Marlow fixed this in:
>> commit f0191c559d683b5bac12243c0db3b780b684799e
>> Author: Simon Marlow<marlowsd at>
>> Date:   Wed Aug 10 10:02:55 2011 +0100
>>       default to using @note for saving the linker opts (someone mentioned
>>       that it wasn't working on Alpha, because we had explicitly listed the
>>       arches rather than having a sensible fallback).
> It seems that this fix did not make it into the 7.2.2 release. Was that
> intentional? What must happen for it to be included in the next release?
> Same for the change here:

Sorry about missing those.  We made 7.2.2 mainly to fix a few critical 
bugs that made 7.2.1 unusable for some people - bugs that caused it to 
generate code that crashed at runtime, with no suitable workaround.  We 
also searched around for other critical bug fixes to include.  Those two 
you mention above fell through the cracks I'm afraid.

7.4.1 will be out soon with all these fixes anyway.


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