Finally there is real progress on the "Headers Error" in the official ZIP file that 7-Zip complains about. The Ada implementation of ZIP has excellent diagnostics. As I didn't want to compile an Ada program, I downloaded the latest available binary distribution for Windows from
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and ran the program in the Windows emulator. Here is the result:
$ wine unzipada.exe -t the-headmaster-win.zip
UnZipAda * minimal standalone unzipping tool
Demo for the Zip-Ada library, by G. de Montmollin
Library version 56 dated 17-Jan-2020
URL:
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Testing archive the-headmaster-win.zip
raised ZIP.ARCHIVE_CORRUPTED : Bad (or no) end-of-central-directory
[unzipada.exe]
0x47ad6d
[unzipada.exe]
0x472e55
[unzipada.exe]
0x45a2e3
[unzipada.exe]
0x481058
[unzipada.exe]
0x4013db
[C:\windows\system32\kernel32.dll]
0x7BBB8AFE at ???
[C:\windows\system32\ntdll.dll]
0x7BD644F1 at ???
[C:\windows\system32\ntdll.dll]
0x7BD659F3 at ???
So we now have two independent programs agreeing that the ZIP file is defective. I think it's time to hand this over to the developer. Only they can know what tool they use to create their ZIP files, and forward the bug report to that tool's author -- or just use a different tool.
Is someone in contact with Altus and Herdone?