Ebuild 999 has a missing or malformed copyright/licensing header.
[Notice] Ebuild 999 has an invalid header. It should start with a valid copyright line (e.g., '# Copyright YEARS MAIN-CONTRIBUTOR') and the GPLv2 distribution text followed by an empty line.
[Warning] Ebuild 999 has a line exceeding 80 positions on line 3.
[Warning] Ebuild 999 uses spaces for indentation on line 18.
[Warning] Ebuild 999 uses spaces for indentation on line 19.
[Warning] Ebuild 999 uses spaces for indentation on line 22.
[Warning] Ebuild 999 uses spaces for indentation on line 23.
[Warning] Ebuild 999 uses spaces for indentation on line 24.
[Error] Repository is missing a repo-name in metadata/layout.conf or profiles/repo_name
[Notice] Package has only unstable keywords for arch(es): [ amd64, x86 ], all versions are unstable: [ 999 ]
[Error] Ebuild app-misc/combinatorica-classica/combinatorica-classica-999.ebuild attempts to install into /usr/local using 'into /usr/local/', which is reserved for non-Portage applications.
[Error] Invalid or missing metadata.xml: file does not exist