error opening ZIP archive member (>4GB archive)

[costing]

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Description

Hi,

Could you please check out this archive?
http://alimonitor.cern.ch/download/mcharchive.zip
(12+ GB)

The following operation fails with it:

root [0] TFile::Open("mcharchive.zip?ZIP=mchtracks.root");
Error in <TZIPFile::ReadMemberHeader>: wrong entry header magic in mcharchive.zip
Error in <TFile::Init>: member mchtracks.root not found in archive mcharchive.zip

Thanks a lot,

.costin

Reproducer

$ wget http://alimonitor.cern.ch/download/mcharchive.zip
$ root
root [0] TFile::Open("mcharchive.zip?ZIP=mchtracks.root");

ROOT version

   ------------------------------------------------------------------
  | Welcome to ROOT 6.32.06                        https://root.cern |
  | (c) 1995-2024, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for linuxx8664gcc on May 14 2025, 03:47:50                 |
  | From tags/v6-32-06-alice7@v6-32-06-alice7                        |
  | With c++ (GCC) 14.2.0                                            |
  | Try '.help'/'.?', '.demo', '.license', '.credits', '.quit'/'.q'  |
   ------------------------------------------------------------------

Installation method

ALICE CVMFS repo

Operating system

lxplus9

Additional context

No response

[ktf]

@dpiparo this is a showstopper for alice.

[dpiparo]

Thanks. Do you have a ROOT version with which this archive can be opened (this is a regression) or this is the first time this operation was attempted?

[costing]

Ciao @dpiparo , I think it never worked, just that so far the zip archives were smaller than the threshold.

[ktf]

For the record, I can reproduce the issue also with 6.28...

[silverweed]

I think I found the problem and fixed it; I'm opening a PR soon (assuming my tests pass locally)

[costing]

Thank you so much guys for the very quick fix!

[github-actions]

Hi @silverweed, @pcanal,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖