Bug 41775 - Zip version needed to extract not correct in System.IO.Compression
Summary: Zip version needed to extract not correct in System.IO.Compression
Alias: None
Product: Class Libraries
Classification: Mono
Component: General (show other bugs)
Version: 4.4.0 (C7)
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: João Matos
Depends on:
Reported: 2016-06-13 20:19 UTC by Bill Holmes
Modified: 2016-06-20 06:15 UTC (History)
2 users (show)

See Also:
Is this bug a regression?: ---
Last known good build:

files to show the problem (1.01 KB, application/zip)
2016-06-13 20:19 UTC, Bill Holmes

Description Bill Holmes 2016-06-13 20:19:38 UTC
Created attachment 16305 [details]
files to show the problem

Found this with NuGet 3.4.4.  NuGet 3.4.4 packages that are created with Mono will cause errors when added to VS.

I have attached a simple case to reproduce the issue.  To run simply `sh run.sh`.

This script downloads Nuget 3.4.4 and runs a pack command.  Then I run zip with a fix argument and get a few warnings.  These warnings appear to be linked to what is causing the problem in VS.

Warning example...
zip warning: Local Version Needed To Extract does not match CD

I believe this is caused by this commit ot mono.

This commit attempted to change the 'version needed to extract' bytes.  For ZipWriter that appears to be correct.  However for ZipCentralDirectoryEntry I believe the 'version made by' bytes were changed.

The patch in the gist below fixes the issue for us.  The zip test referenced above works with the change as well as VS can not read the nupkg.


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