[COMPRESS-492] NullPointerException for 7zip files without file headers

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.18
• Fix Version/s: 1.20
• Component/s: Archivers
• Labels: 7zip nullpointerexception
• Assignee: Unassigned
• Reporter: Bernhard Geisberger
• Created: 27/Aug/19 09:38
• Updated: 28/Aug/19 15:48
• Resolved: 28/Aug/19 15:48

Description

When loading a .7z file with correct headers and without files info headers using the SevenZFile class, a NullPointerException is thrown when calling getEntries or getNextEntry, because the archive.files member of SevenZFile is null. Ideally, a subclass of IOException should be thrown in this case.

I attached an example file we encountered in our file processing pipeline, which causes the exception.