glibc 2.28 autopkgtest failures

[Michael Hudson-Doyle]

On Tue, 4 Sep 2018 at 13:26, Michael Hudson-Doyle <
michael.hudson at canonical.com> wrote:


> The bug is that when you lie to cffi about the return type of a variable,
> in particular when you say a function returning a float does not return a
> float, the x87 stack is not wiped to the extent required by the calling
> convention. glibc 2.28 rewrote the cos function in a way that apparently
> now cares about this (or I guess gcc now compiles the function in a way
> that cares about this) but make no mistake, it only ever worked by chance
> before. So I think the test_sin_no_return_value test should be skipped on
> i386. (I'll file an upstream issue I guess).
>

https://bitbucket.org/cffi/cffi/issues/382/test_sin_no_return_value-violates-calling


> Cheers,
> mwh
>
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