Internal 7zip fails to add/flag files with square brackets

I discovered a flaw in the internal 7zip function. These are the steps to reproduce the problem. In the lines below, I have modified URLs for privacy, but nothing relevant. The issue is that 7zip seemingly added 10 members to "test1.7z" without complaint, but when I viewed the archive contents, files with square brackets in the filenames had not been added. If those filenames were deemed invalid, an error message should have been emitted during archive creation.


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