A bug in the Aider AI coding assistant causes it to silently discard correct code changes when the model's output format doesn't match Aider's guessed format. This issue, reported by a user interacting with Qwen3.8-Max-Preview via an OpenAI-compatible endpoint, occurs when Aider auto-selects a full-file rewrite format but the model returns a standard unified diff. Instead of signaling an error, Aider simply drops the response, leaving the user unaware that their work has been lost. This is the third reported instance of silent failure in Aider where work is lost or an error occurs without downstream notification. AI
IMPACT This bug highlights the critical need for robust error handling and user feedback in AI coding assistants to prevent silent data loss.
RANK_REASON Bug report on an AI coding assistant tool.
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