IssueTracker

See also https://github.com/zhanghai/MaterialFiles/issues/1260#issuecomment-2196254166 for a bit more info about the error.

Stacktrace:

CREATED
OPENED
SENT: 220 Service ready for new user.
RECEIVED: USER anonymous
SENT: 331 Guest login okay, send your complete e-mail address as password.
RECEIVED: PASS *****
PASS.execute()
java.lang.ClassCastException
	at e5.a.p(SourceFile:1)
	at S8.f.e(SourceFile:75)
	at M8.q.a(SourceFile:270)
...
Login failure - anonymous
SENT: 530 Authentication failed.
CLOSED

Deobfuscated stacktrace:

java.lang.ClassCastException
	at org.apache.ftpserver.impl.FtpIoSession.getClientCertificates(FtpIoSession.java)
	at org.apache.ftpserver.command.impl.PASS.execute(PASS.java)
	at org.apache.ftpserver.impl.DefaultFtpHandler.messageReceived(DefaultFtpHandler.java)
...

Steps to reproduce:

1. Clone https://github.com/zhanghai/MaterialFiles/tree/v1.7.3 (the v1.7.3 release tag).
2. Create a signing.properties by following signing.properties.example in the project, i.e. generate a signing key and fill it in.
3. Run ./gradlew clean build and install APK
4. Start FTP server from drawer, then use "Add stroage > FTP server" and 127.0.0.1:2121 + Anonymous authentication to connect to that server, connection fails due to auth failure and the above ClassCastException is shown in the logcat.
5. Rebuild the app but with android.enableR8.fullMode=false added to gradle.properties (similar to this reverted commit), then install, restart FTP server and retry the FTP connection - it works fine this time without R8 full mode.