[postgis-devel] Build Farm Needs?

Mateusz Loskot mateusz at loskot.net
Thu Apr 19 04:05:05 PDT 2018


On 19 April 2018 at 12:15, Regina Obe <lr at pcorp.us> wrote:
>> I've had a vague report in russian postgres telegram chat that 32bit
>> raster tests crash not only on FreeBSD, but we don't have any other 32bit
>> thing buildfarm, and debugging crashes on FreeBSD requires some more
>> experience than I currently posess.
>
> We do 32-bit windows tests but for some reason raster doesn't crash in
> 32-bit windows runs, so guess it's not all 32-bits.

FYI, I noticed a curious test failure for a particular raster library when
built with GCC 5 with optimisation for 64-bit
plus on VS2017 with optimisation for 64-bit

That is the test is failing in 1 of 18 (19) compilers :)
https://twitter.com/mloskot/status/984834302482542592

Undefined behaviours due to optimisations, strict aliasing and such
may rarely bubble up, but it doesn't mean they are not there.
Especially where there is lots of bits access, bit shuffling, etc.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net


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