/usr/lib/debug/.build-id/e2/ is in qtbase5-examples-dbg 5.5.1+dfsg-16ubuntu7.
This file is owned by root:root, with mode 0o755.
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    /usr/lib/debug/.build-id/e2/1b60aef92b99e42a342c7c773788f1b647a35f.debug
    
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    /usr/lib/debug/.build-id/e2/fc0e3cd5ccf399c1e89cfd50a1cc74561d3a3a.debug
    
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