Mu3 score reported as broken in Mu4

[Jojo-Schmitz]

Issue type

Import/export issue

Bug description

No response

Steps to reproduce

The attached (zipped) score
bongo esp.zip
opens fine in Mu3(.6.2), but in Mu4(1.1 at least and later) it reports:
Error=XML_ERROR_EMPTY_DOCUMENT ErrorID=13 (0xd) Line number=0

Extracting the mscx, and importing that in Mu4 works just fine.
As does opening and resaving with Mu3 and importing that in Mu4

Edit: As does renaming the mscz file to fully match the name of the mscx inside.

Screenshots/Screen recordings

No response

MuseScore Version

4.1.1, 4.2.0 Beta and latest master

Regression

Yes, this used to work in MuseScore 3.x and now is broken

Operating system

Windows 11

Additional context

Culprit seems to be the name of the mscx, "..bongo español.mscx", or its encoding (esp. that of the "ñ"?) in META-INF/container.xml, as ""

Originally came up in https://musescore.org/en/node/357693

Edit: the real culprit seems the mcsz filename originally starting with 2 dots (and the mscx internally still does), but got those dots 'renamed away'

[cbjeukendrup]

I can confirm that it opens fine in MS3, while in BBEdit (which I normally use for quickly viewing the contents of mscz files) the main mscx doesn't show up at all. So the ZIP is perhaps a little bit corrupted, or maybe indeed some decoders are unhappy about the ñ...

[Jojo-Schmitz]

7Zip opens it just fine, as does the built-in zip in Windows explorer

[cbjeukendrup]

macOS built-in zip utility too; but the file appears as a hidden file, because the filename starts with two dots

[Jojo-Schmitz]

Yes, those dots are an additional problem on Mac and Linux

[krtschil]

Changing the special characters (the dots and the spanisch character) in the zip file does not change the behaviour. Muse 4.1.1 does not open it.
When I extract the .mscx file it will open in Musescore correctly without an error message.

I saved this to a new file and looked at the content. Different from the original one from the original poster and opens in Musescore without problems.
(I am on Linux)
bongo2.mscz.zip

[Jojo-Schmitz]

Of colurse not, you'd need to change the mscx filename (in the archive) and the corresponding entry in META_INF/container.xml. If you'd do, it'd work, I've tested that
That the plain (extracted) mscx file loads is mentioned in the initial post ;-)

[krtschil]

I did that in all the places ...

[Jojo-Schmitz]

OK, that did work when I tried

[mercuree]

This file opens fine in MU4 if you rename bongo esp.mscz to ..bongo español.mscz (same name as mscx file inside archive)
Unicode character in filename has no effect to this issue (at least on my system win10)
It also means that we can simply reproduce this "corruption" in MU4. Just create new musescore file and save with file name started with dots. Then rename file to anything else and it becomes corrupted.

[Jojo-Schmitz]

It is not the MSCZ filename itself, but the filenames inside the MSCZ

[mercuree]

It is not the MSCZ filename itself, but the filenames inside the MSCZ

Yes. But the magic is that if you rename the mscz file, it starts to open. You don't need to touch files inside archive at all.

[Jojo-Schmitz]

I can't confirm that

[mercuree]

file_rename_dot_issue.mp4

[Jojo-Schmitz]

OK, confirmed, very strange

Just create new musescore file and save with file name started with dots. Then rename file to anything else and it becomes corrupted.

I can confirm this too!

[cbjeukendrup]

Thanks a lot for the hints here! I think I'll have a solution ready soon.

[DmitryArefiev]

Fixed in #20521