Qwen Model Gets Stuck in Infinite Internal Monologue Loop
A user on r/LocalLLaMA shared an example of a Qwen model getting stuck in a repetitive internal reasoning loop, endlessly debating running a test suite without ever executing it. This artifact highlights the issue of LLM overthinking and reasoning loop failures, where models consume generation budget on internal narrative rather than proceeding to execution or final answers. The generated output consists of dozens of casual stream-of-consciousness monologues repeating statements like 'running the test suite now' while failing to stop reasoning and output the command execution.
## BACKGROUND
Qwen is a family of open-weights large language models developed by Alibaba Cloud. Modern reasoning-focused LLMs use chain-of-thought processing to think before producing an answer, but improper stop conditions or control flows can cause models to fall into infinite internal loops.