/usr/share/common-lisp/source/closure-common/ is in cl-closure-common 20101107-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/common-lisp/source/closure-common/characters.lisp
/usr/share/common-lisp/source/closure-common/closure-common.asd
/usr/share/common-lisp/source/closure-common/definline.lisp
/usr/share/common-lisp/source/closure-common/encodings-data.lisp
/usr/share/common-lisp/source/closure-common/encodings.lisp
/usr/share/common-lisp/source/closure-common/hax.lisp
/usr/share/common-lisp/source/closure-common/package.lisp
/usr/share/common-lisp/source/closure-common/runes.lisp
/usr/share/common-lisp/source/closure-common/stream-scl.lisp
/usr/share/common-lisp/source/closure-common/syntax.lisp
/usr/share/common-lisp/source/closure-common/utf8.lisp
/usr/share/common-lisp/source/closure-common/xstream.lisp
/usr/share/common-lisp/source/closure-common/ystream.lisp