{"record":{"id":"e991b2deac376bb6","repo":"openai/codex","slug":"features-token-budget-auto-compact-fallback-buffer","errorCode":null,"errorMessage":"features.token_budget.auto_compact_fallback_buffer_tokens is required when auto_compact_fallback_prompt is set","messagePattern":"features\\.token_budget\\.auto_compact_fallback_buffer_tokens is required when auto_compact_fallback_prompt is set","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"codex-rs/core/src/config/mod.rs","lineNumber":1182,"sourceCode":"            ));\n        }\n\n        if self\n            .auto_compact_fallback_prompt\n            .as_ref()\n            .is_some_and(|prompt| prompt.len() > AUTO_COMPACT_FALLBACK_PROMPT_MAX_BYTES)\n        {\n            return Err(std::io::Error::new(\n                std::io::ErrorKind::InvalidInput,\n                format!(\n                    \"features.token_budget.auto_compact_fallback_prompt must not exceed {AUTO_COMPACT_FALLBACK_PROMPT_MAX_BYTES} bytes\"\n                ),\n            ));\n        }\n        if self.auto_compact_fallback_prompt.is_some()\n            && self.auto_compact_fallback_buffer_tokens.is_none()\n        {\n            return Err(std::io::Error::new(\n                std::io::ErrorKind::InvalidInput,\n                \"features.token_budget.auto_compact_fallback_buffer_tokens is required when auto_compact_fallback_prompt is set\",\n            ));\n        }\n        if self\n            .auto_compact_fallback_buffer_tokens\n            .is_some_and(|tokens| tokens <= 0)\n        {\n            return Err(std::io::Error::new(\n                std::io::ErrorKind::InvalidInput,\n                \"features.token_budget.auto_compact_fallback_buffer_tokens must be positive\",\n            ));\n        }\n\n        Ok(())\n    }\n\n    pub(crate) fn fallback_buffer_tokens(&self) -> i64 {","sourceCodeStart":1164,"sourceCodeEnd":1200,"githubUrl":"https://github.com/openai/codex/blob/339751715c64496cb86246bfb3935f40e309dd3d/codex-rs/core/src/config/mod.rs#L1164-L1200","documentation":"Error \"features.token_budget.auto_compact_fallback_buffer_tokens is required when auto_compact_fallback_prompt is set\" thrown in openai/codex.","triggerScenarios":"Thrown at codex-rs/core/src/config/mod.rs:1182 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Set auto_compact_fallback_buffer_tokens when auto_compact_fallback_prompt is set."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"339751715c64496cb86246bfb3935f40e309dd3d","analyzedAt":"2026-08-25T05:35:09.876Z","schemaVersion":2},"datasetVersion":"2026-08-25T06:17:31.827Z"}