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Repair coordinated lexer ownership when cloning Lark LALR interactive parsers.

Repair coordinated lexer ownership when cloning Lark LALR interactive parsers.: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). Repair independent LALR interactive-parser clones The frozen Lark tree in /app/vendor/lark has a clone-ownership regression. Copying an…

The task

Repair independent LALR interactive-parser clones The frozen Lark tree in /app/vendor/lark has a clone-ownership regression. Copying an InteractiveParser after partially consuming a source stream creates multiple lexer objects whose references do not agree. A clone may…

Part of XiaomiMiMo/MiMo-V2.6-RL-oss.