see
https://reproduce.debian.net/amd64/api/v1/builds/256496/artifacts/655740/diffoscope

filing as RC, because that keeps out gcc-bpf and dtrace out of testing.

Debian Bug Tracking System wrote:

Heads up that the .ar handler was disabled in December 2018:

 strip-nondeterminism (1.0.0-1) unstable; urgency=medium
 .
   * Ignore encrypted .zip files as we can never normalise them.
     (Closes: #852207)
   * Drop .ar handler; binutils is reproducible. (Closes: #781262, #843811)
     - Update debian/copyright to drop reference to ar.pm.
   * Remove javaproperties handler after Emmanuel Bourg's patch was released in
     openjdk-11 11.0.1+13-3. (Closes: #914289)

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=843811#32 for more
context.


Best wishes,

and yet we missed gcc-bpf and according to
https://tests.reproducible-builds.org/debian/issues/unstable/timestamps_in_static_libraries_issue.html
maybe also 3 others:
avr-libc gcc-avr qt6-base

I wonder if this should be documented within strip-nondeterminism,
eg files it could normalize but does not.