notfound 1127743 zlib/1:1.3.dfsg+really1.3.1-2
kthxbye

On Thu, Feb 12, 2026 at 02:13:11PM +0100, Paul Gevers wrote:

> With a recent upload of zlib the autopkgtest of google-android-installers
> fails in testing when that autopkgtest is run with the binary packages of
> zlib from unstable. It passes when run with only packages from testing. In
> tabular form:
>                            pass            fail
> zlib                       from testing    1:1.3.dfsg+really1.3.1-2
> google-android-installers  from testing    1755725555-1
> all others                 from testing    from testing

> I copied some of the output at the bottom of this report.

> Currently this regression is blocking the migration of zlib to testing [1].
> Due to the nature of this issue, I filed this bug report against both
> packages. Can you please investigate the situation and reassign the bug to
> the right package?

...

> 131s /usr/lib/android-sdk/build-tools/19.1.0/aapt: error while loading
> shared libraries: libz.so.1: wrong ELF class: ELFCLASS64
> 131s autopkgtest [03:13:03]: test command1

This looks like something in whatever the proprietary binaries are
doing, and if the package were so misbuilt that the ELF headers were so
mangled as to prevent loading I'd expect to see vastly more reports of
problems than just one random CI failure like this.  My best guess would
be that some toolchain change has triggered some fragility in the non
free code.

I've untagged zlib for now, if there's some analysis showing an actual
problem in the package feel free to retag it.

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