{"record":{"id":"6ac51c5d1b49e87d","repo":"Zackriya-Solutions/meetily","slug":"buffer-should-always-be-available","errorCode":null,"errorMessage":"Buffer should always be available","messagePattern":"Buffer should always be available","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"info","filePath":"frontend/src-tauri/src/audio/buffer_pool.rs","lineNumber":91,"sourceCode":"/// RAII wrapper that automatically returns buffer to pool when dropped\npub struct PooledBuffer {\n    buffer: Option<Vec<f32>>,\n    pool: AudioBufferPool,\n}\n\nimpl PooledBuffer {\n    /// Create a new pooled buffer\n    pub fn new(pool: AudioBufferPool) -> Self {\n        let buffer = pool.get_buffer();\n        Self {\n            buffer: Some(buffer),\n            pool,\n        }\n    }\n\n    /// Get mutable access to the underlying buffer\n    pub fn as_mut(&mut self) -> &mut Vec<f32> {\n        self.buffer.as_mut().expect(\"Buffer should always be available\")\n    }\n\n    /// Get immutable access to the underlying buffer\n    pub fn as_ref(&self) -> &Vec<f32> {\n        self.buffer.as_ref().expect(\"Buffer should always be available\")\n    }\n\n    /// Consume the wrapper and return the buffer (will not be returned to pool)\n    pub fn into_inner(mut self) -> Vec<f32> {\n        self.buffer.take().expect(\"Buffer should always be available\")\n    }\n}\n\nimpl Drop for PooledBuffer {\n    fn drop(&mut self) {\n        if let Some(buffer) = self.buffer.take() {\n            self.pool.return_buffer(buffer);\n        }","sourceCodeStart":73,"sourceCodeEnd":109,"githubUrl":"https://github.com/Zackriya-Solutions/meetily/blob/0281737d87d26352fb0adc78c8c0975f691b23d1/frontend/src-tauri/src/audio/buffer_pool.rs#L73-L109","documentation":"PooledBuffer.as_mut() expects the inner Option<Vec<f32>> to be Some. It is Some from construction and is only taken by into_inner (which consumes self) and by Drop, so a None here requires using the wrapper while Drop is running (reentrant drop) or unsafe/mem::forget misuse. In correct code this invariant cannot be violated.","triggerScenarios":"A Drop implementation on a struct containing PooledBuffer that calls as_mut on it during teardown, refactoring that adds an early buffer.take(), or double-use after into_inner via unsafe aliasing. Normal new -> as_mut -> drop usage never triggers it.","commonSituations":"Almost never observed; appears after refactors that move take() outside into_inner/Drop or when wrapping PooledBuffer in types with custom Drop handlers in the audio pipeline.","solutions":["Treat the panic as a design smell: audit for any buffer.take() outside into_inner and Drop","If it fires, run with RUST_BACKTRACE=1 to find the reentrant Drop or aliasing site","Consider returning Option/&mut from accessors or making take-sites explicit so misuse becomes a compile error"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {\n    pooled.as_mut().extend_from_slice(chunk);\n}));\nif result.is_err() {\n    log::error!(\"audio worker panicked; replacing pooled buffer\");\n    *pooled = PooledBuffer::new(pool.clone());\n}","preventionTips":["Do not implement Drop on structs that hold PooledBuffer and touch them in drop","Keep take() calls confined to into_inner and Drop","Isolate audio worker loops with catch_unwind or dedicated threads so a panic cannot kill the app"],"tags":["rust","buffer-pool","invariant","option-expect","audio"],"backgroundTag":"option-expect-invariant-panic","analyzedSha":"0281737d87d26352fb0adc78c8c0975f691b23d1","analyzedAt":"2026-08-16T20:57:52.567Z","schemaVersion":2},"datasetVersion":"2026-08-16T23:17:17.608Z"}