[cfe-dev] Help needed diagnosing LibC++ test failures

[Eric Fiselier via cfe-dev]

Hi Martin,

Please provide the full test logs, including how the tests were invoked.

/Eric

On Mon, Feb 20, 2017 at 9:20 AM, Martin J. O'Riordan via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> I am investigating various failures when running the LibC++ test-suite
> (v4.0 branch, svn rev #294535), and a couple of them have me really
> stumped.  The following two tests were failing:
>
>
>
> language.support/support.dynamic/new.delete/new.delete.
> array/sized_delete_array14.pass.cpp
>
> language.support/support.dynamic/new.delete/new.delete.
> single/sized_delete14.pass.cpp
>
>
>
> and I realised that I needed to add ‘-fsized-deallocation’.  This fixed
> the ‘array’ version, but curiously the ‘single’ version still fails, and
> none of the three versions of ‘operator delete’ are being called.  We
> have not made any changes to the C++ front-end, so I don’t understand how
> our target might cause this.
>
>
>
> The other group of failures is a lot more strange, and I haven’t been able
> to track down that could be wrong.  Most of the tests in the following
> directories fail:
>
>
>
> containers/associative/map/map.access
>
> containers/associative/map/map.cons
>
> containers/associative/map/map.modifiers
>
> containers/associative/map/map.ops
>
> and:
>
> containers/associative/set
>
>
>
> and all in the same way.  In each case the ‘map’ or ‘set’ is reporting ‘
> m.size()’ as ‘2’ instead of the expected value, and the ‘assert’ for this
> causes the test to fail.  The logic of what is happening disappears deeply
> into the template iterator expansions for the construction of the ‘map’
> or ‘set’ from the array of ‘pair’s provided to the constructor, and I am
> wondering is anybody has any tips on how I can approach identifying why
> these are breaking in this way?
>
>
>
> The only thing that I can think of in our target that might be anyway
> unusual, is that we have selected ‘IEEESingle’ for both ‘float’ and ‘
> double’, and all of these examples involve ‘pair<int, double>’, but even
> so I can’t think how this would impact these tests.
>
>
>
> Thanks,
>
>
>
>             MartinO
>
>
>
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>
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