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Address sanitiser error in track fit / state provider

See sanitiser error at

https://lhcb-nightlies.web.cern.ch/logs/tests/nightly/lhcb-sanitizers/594/x86_64-centos7-gcc9-dbg+asan/Moore/#failures_75

Full list of tracebacks attached below as well, for convenience.

Scanning through them, looks to me most likely relates to something in the tracking / track fit / state provider, but an expert will need to investigate.

Error only appears in the hlt2_particles_baseline. @sstahl you worked on the update that added the ProtoParticle making that added this test. Any idea what this test is doing that means it is causing this issue, which is not seen in other places ?

@wouter @graven FYI

rec_148_sanitizer.log

Edited by Alex Pearce