[BUG/Android]: trash_media_files - Cross-device link (os error 18)

[david-allison]

Still diagnosing on our side, I'll relay relevant information here.

At a quick glance, it feels the fs::rename would be the issue, but I don't see how the cross-device link would be produced via the Rust.

• https://github.com/ankidroid/Anki-Android/issues/19134

net.ankiweb.rsdroid.BackendException$BackendCardTypeException: Cross-device link (os error 18)
	at net.ankiweb.rsdroid.exceptions.BackendIoException.<init>(BackendIoException.java:23)
	at net.ankiweb.rsdroid.BackendException$Companion.fromError(BackendException.kt:197)
	at net.ankiweb.rsdroid.BackendKt.unpackResult(Backend.kt:317)
	at net.ankiweb.rsdroid.BackendKt.access$unpackResult(Backend.kt:1)
	at net.ankiweb.rsdroid.Backend.runMethodRaw$lambda$1(Backend.kt:133)
	at net.ankiweb.rsdroid.Backend.withBackend(Backend.kt:145)
	at net.ankiweb.rsdroid.Backend.runMethodRaw(Backend.kt:132)
	at anki.backend.GeneratedBackend.trashMediaFilesRaw(GeneratedBackend.kt:2889)
	at anki.backend.GeneratedBackend.trashMediaFiles(GeneratedBackend.kt:2896)
	at com.ichi2.anki.libanki.Media.trashFiles(Media.kt:156)

deckPath: /storage/emulated/0/Android/data/com.ichi2.anki/files/AnkiDroid

Relevant code

https://github.com/ankitects/anki/blob/3d0a408a2b1f86a647e2f3e6eee20893fa0dc706/rslib/src/media/service.rs#L43-L45 https://github.com/ankitects/anki/blob/3d0a408a2b1f86a647e2f3e6eee20893fa0dc706/rslib/src/media/mod.rs#L92-L108 https://github.com/ankitects/anki/blob/3d0a408a2b1f86a647e2f3e6eee20893fa0dc706/rslib/src/media/files.rs#L323-L362

[dae]

trash_folder() was designed to create the trash folder in the same folder parent folder as the media folder, to avoid such issues, so the error is surprising. Is it only one user affected?

[david-allison]

Only one user affected, and I haven't heard back from them