Bug#1059785: benchmark breaks ABI without SONAME bump

[Paul Gevers]

Source: benchmark
Control: found -1 benchmark/1.8.3-1
Severity: serious
Tags: sid trixie

Dear maintainer(s),

With a recent upload of benchmark the autopkgtest of pytorch fails in 
testing when that autopkgtest is run with the binary packages of 
benchmark from unstable. It passes when run with only packages from 
testing. In tabular form:

                        pass            fail
benchmark              from testing    1.8.3-1
pytorch                from testing    2.0.1+dfsg-5
all others             from testing    from testing

I copied some of the output at the bottom of this report. This looks 
very much like benchmark dropped a symbol from its shared library 
without a SONAME bump. Can you please investigate and clarify? Currently 
this is blocking the migration of benchmark to testing, as I reported in 
bug 1056202, but because benchmark is a key package, that didn't lead to 
its removal.

The release team has also received a request to rebuild 
ros2-performance-test-fixture (bug 1057304), so it seems more packages 
are affected.

Paul

[1] https://qa.debian.org/excuses.php?package=benchmark

https://ci.debian.net/data/autopkgtest/testing/arm64/p/pytorch/41359814/log.gz

1276s /usr/lib/libtorch-test/c10_intrusive_ptr_benchmark: symbol lookup 
error: /usr/lib/libtorch-test/c10_intrusive_ptr_benchmark: undefined 
symbol: _ZN9benchmark8internal9BenchmarkC2EPKc
1276s autopkgtest [08:27:24]: test 
44_of_98__cpptest__c10_intrusive_ptr_benchmark

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