Re: plpython versus gcc 4.5.x

On 01/22/2011 01:38 PM, Tom Lane wrote:
> Buildfarm members bobcat (Fedora 14 x86) and frogmouth (mingw) have
> been showing an assertion failure in the plpython regression tests
> since this patch went in:
> http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=740e54c
>
> I have been able to reproduce the problem locally on Fedora 14 x86_64.
> The common thread appears to be use of gcc 4.5 --- Andrew says that
> frogmouth is using 4.5.0, and current F-14 has gcc 4.5.1. I have found
> that manually re-inlining PLy_procedure_input_conversion is sufficient
> to make the problem go away, as is reducing the optimization level below
> -O2.
>
> Based on these observations, I believe it's not our bug but an
> optimization bug in gcc, and have accordingly filed a gcc bug:
> https://bugzilla.redhat.com/show_bug.cgi?id=671899
> However, it's hard to guess how long it might take for the gcc boys to
> provide a fix, and in any case I fear it will be a long time before the
> fix propagates to places like mingw.
>
> Given these facts, and the fact that the above-mentioned patch has no
> purpose other than code beautification, I recommend reverting the patch.
> We could just revert the de-inlining of PLy_procedure_input_conversion,
> but there doesn't seem to be a lot of point in having one separate and
> the other not.
>

Since there's only one call site for each function, I don't think it's
worth making herculean efforts to do anything else.

so +1

cheers

andrew