[BUG] Crash in ownCloud File Provider

[marcomasser]

I noticed a crash in the file provider extension because Files.app showed an error about content not being available (sorry, I forgot to take a screenshot and don’t remember the exact wording). I haven’t come across this before, so I looked into the analytics section of Settings.app and found one crash log: ownCloud File Provider-2023-08-01-221518.ips.zip

Steps to reproduce

Unknown. This only happened once so far and it’s not clear what triggered it.

Client

iOS version: 16.5.1 (iPadOS, actually)

ownCloud app version: 12.0.3 (274)

Device model: iPad 8th generation (iPad11,6)

[michaelstingl]

ownCloud app version: 12.0.3 (274)

Another? crash was fixed in the 275 build:

• [BUG] Sebastian's issue issue with iOS Files app #1245 (comment)

Maybe it solves your crash too?

[marcomasser]

Thanks for the hint, I will make sure that build is installed and report back in case this comes up again. But as I don’t know how to reproduce the crash, it might just not happen again. Feel free to close this issue and I’ll reopen it if necessary.

[felix-schwarz]

Thanks for sharing the crash log. It pointed to a strange issue where iOS invokes a FileProvider method with a nil parameter for which nil values aren't allowed, leading to an exception in another system call that doesn't allow a nil parameter.

In build 276 (currently processing in App Store Connect, should be available within an hour via TestFlight), I added a mitigation for that case, so iOS using a nil parameter where it shouldn't should no longer lead to a crash.

[marcomasser]

Oh nice, thanks!