{"record":{"id":"e84c1f0cd5221bfd","repo":"flxzt/rnote","slug":"accessing-imagesurface-data-failed-err-e","errorCode":null,"errorMessage":"accessing imagesurface data failed, Err: {e:?}","messagePattern":"accessing imagesurface data failed, Err: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/rnote-engine/src/svg.rs","lineNumber":264,"sourceCode":"                .context(\"read stream to rsvg loader failed.\")?;\n\n            let renderer = rsvg::CairoRenderer::new(&handle);\n            renderer\n                .render_document(\n                    &cx,\n                    &cairo::Rectangle::new(\n                        bounds.mins[0],\n                        bounds.mins[1],\n                        bounds.extents()[0],\n                        bounds.extents()[1],\n                    ),\n                )\n                .map_err(|e| anyhow::anyhow!(\"rendering rsvg document failed, Err: {e:?}\"))?;\n        }\n\n        let data = surface\n            .data()\n            .map_err(|e| anyhow::anyhow!(\"accessing imagesurface data failed, Err: {e:?}\"))?\n            .to_vec();\n\n        Ok(Image {\n            data: glib::Bytes::from_owned(convert_image_bgra_to_rgba(\n                width_scaled,\n                height_scaled,\n                data,\n            )),\n            rectangle: Rectangle::from_p2d_aabb(bounds),\n            pixel_width: width_scaled,\n            pixel_height: height_scaled,\n            // cairo renders to bgra8-premultiplied, but we convert it to rgba8-premultiplied\n            memory_format: ImageMemoryFormat::R8g8b8a8Premultiplied,\n        })\n    }\n}\n","sourceCodeStart":246,"sourceCodeEnd":281,"githubUrl":"https://github.com/flxzt/rnote/blob/bbc5354502ba2fc83eec2670b535348825e679a6/crates/rnote-engine/src/svg.rs#L246-L281","documentation":"Thrown by Svg::gen_image when cairo's ImageSurface::data() returns Err. Accessing the raw pixel buffer requires the surface to be finished and in a healthy state; cairo returns an error if the surface is in an error status or the borrow rules (no live references) are violated.","triggerScenarios":"Calling surface.data() while a cairo::Context referencing the surface is still alive (hence the inner scope), or the surface entered an error state during rendering.","commonSituations":"Restructuring gen_image so the Context outlives the data() call (borrow error surfaced as cairo error), or a failed render leaving the surface in an error state.","solutions":["Ensure the cairo::Context is dropped before calling data() — keep it in an inner scope as the code does","Check for earlier render failures that put the surface into an error state","Call surface.flush() before reading data if needed","Log the wrapped cairo::Error for the exact status"],"exampleFix":"// before\nlet data = surface.data().map_err(|e| anyhow::anyhow!(\"accessing imagesurface data failed, Err: {e:?}\"))?.to_vec();\n// after\nsurface.flush();\nlet data = surface.data().map_err(|e| anyhow::anyhow!(\"accessing imagesurface data failed: {e:#}\"))?.to_vec();","handlingStrategy":"try-catch","validationCode":"surface.flush();\nif surface.status() != cairo::Status::Success { anyhow::bail!(\"surface in error state: {:?}\", surface.status()); }","typeGuard":"fn readable(surface: &cairo::ImageSurface) -> bool { surface.status() == cairo::Status::Success }","tryCatchPattern":"let data = match surface.data() {\n    Ok(d) => d.to_vec(),\n    Err(e) => { log::error!(\"surface data access failed: {e:?}\"); return Err(e.into()); }\n};","preventionTips":["Keep the cairo::Context in an inner scope so it is dropped before data()","Call surface.flush() before reading pixel data","Check surface.status() after rendering"],"tags":["cairo","image","borrow"],"backgroundTag":"invalid-state-transition","analyzedSha":"bbc5354502ba2fc83eec2670b535348825e679a6","analyzedAt":"2026-09-08T13:20:33.747Z","contentChangedAt":"2026-09-08T13:20:33.747Z","schemaVersion":2},"datasetVersion":"2026-09-16T04:17:20.429Z"}