/usr/share/lintian/overrides/libboinc-app7 is in libboinc-app7 7.2.42+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # it would not have complained if the package name was
# libboinc-api7. It is not.
libboinc-app7 binary: package-name-doesnt-match-sonames
|