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BotInstance loads the persisted custom avatar in its constructor and handed
it to profileManager.setCustomAvatar(). On an idle bot that method
immediately starts the three-step file transfer
(fileTransferInitUpload -> uploadFileData -> clientupdate) — but the
constructor runs long before tsClient.connect(), so TS3Client.client is
still null and the very first step throws "Not connected".
Scope of the bug: setCustomAvatar stores the buffer before attempting the
upload, and profileManager.onConnect() re-applies this.customAvatar once the
handshake completes, so the avatar itself did end up on the server. What the
premature call actually cost was a guaranteed-to-fail file transfer plus a
"Profile update failed" warning on every bot start — and every restart, since
manager.startBot() tears the instance down and reconstructs it. ("Not
connected" is not in handleFeatureError's unrecoverable list, so it never
disabled the avatar feature.)
Add loadCustomAvatar(), which only stores the buffer, and use it at the
constructor call site. onConnect() was already doing the real work, so
nothing is lost. Guard on length > 0 as well: avatarStore.write() is
delete-then-write, so a crash mid-write leaves a 0-byte file, and a 0-byte
Buffer is truthy — previously that took setCustomAvatar's else branch and
fired two more doomed calls (fileTransferDeleteFile + a clear).
setCustomAvatar keeps its immediate-apply behaviour, so editing the avatar
from the WebUI on a live bot still takes effect right away.
Reported-by: @shenmu-rua
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>