[cctbxbb] scitbx test crashing on mac

[Richard Gildea]

$ xcodebuild -version
Xcode 6.3
Build version 6D570

On 14 April 2015 at 08:57, Richard Gildea <rgildea at gmail.com> wrote:

> Hi Luc,
>
> It was strange, because it only appeared after I updated our mac-mini
> nightly build machine with the latest OS X and Xcode updates the other day.
> However mine and Graeme's mac book pros both have the latest Apple updates
> installed and it appears to work fine on our machines (although I'm not
> certain either of us actually tried a full build from scratch running the
> bootstrap.py script).
>
> Cheers,
>
> Richard
>
> $ clang --version
> Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
> Target: x86_64-apple-darwin14.3.0
> Thread model: posix
>
> $ sw_vers -productVersion
> 10.10.3
>
> Xcode must be latest version (whatever that is).
>
>
> On 14 April 2015 at 08:22, Luc Bourhis <luc_j_bourhis at mac.com> wrote:
>
>>
>> On 14 Apr 2015, at 08:44, Richard Gildea <rgildea at gmail.com> wrote:
>>
>> I managed to 'fix' the error with this commit:
>>
>> https://sourceforge.net/p/cctbx/code/22003/
>>
>> However, I have no idea why the previous code was problematic. Adding a
>> SCITBX_ASSERT(vi != 0); in the 'else' statement also made the error go
>> away. I can have another look and try out your suggestions later today to
>> see if that results in any more insight into the underlying problem.
>>
>>
>> My suggestions only aimed at zeroing on the problem. Now that you have
>> found a fix, you won't learn more by following my suggestions. It looks
>> like a bug in the optimiser of whatever version of clang/llvm Apple uses in
>> the version of Xcode installed on that machine. Note clang optimiser had
>> troubles with that file a couple of  years ago: it was missing some
>> optimisations and the produced code was too slow. So now it looks too
>> eager! So classic unfortunately…
>>
>> For the record, could you paste the outcome of "clang --version" on that
>> machine? And tell us the version of Xcode as well.
>>
>> I will move to Yosemite soon-ish but for the time being, I can't help
>> much.
>>
>> Best wishes,
>>
>> Luc
>>
>>
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>>
>>
>
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