RustBackupManager.getServerBackupInfo() returns deleted backup info after RustBackupManager.deleteKeyBackupVersion() call

[florianduros]

RustBackupManager.deleteKeyBackupVersion deletes a key backup on the server:

matrix-js-sdk/src/rust-crypto/backup.ts

Lines 580 to 586 in 781c3b0

	public async deleteKeyBackupVersion(version: string): Promise<void> {
	logger.debug(`deleteKeyBackupVersion v:${version}`);
	const path = encodeUri("/room_keys/version/$version", { $version: version });
	await this.http.authedRequest<void>(Method.Delete, path, undefined, undefined, {
	prefix: ClientPrefix.V3,
	});
	}

If we delete the active backup, the properties RustBackupManager.serverBackupInfo & RustBackupManager.activeBackupVersion are out of sync.

When we call RustBackupManager.getServerBackupInfo, we get the key backup info of the deleted backup.

matrix-js-sdk/src/rust-crypto/backup.ts

Lines 111 to 116 in 781c3b0

	public async getServerBackupInfo(): Promise<KeyBackupInfo | null | undefined> {
	// Do a validity check if we haven't already done one. The check is likely to fail if we don't yet have the
	// backup keys -- but as a side-effect, it will populate `serverBackupInfo`.
	await this.checkKeyBackupAndEnable(false);
	return this.serverBackupInfo;
	}