{"record":{"id":"2a39e82ee8925b12","repo":"zeroclaw-labs/zeroclaw","slug":"slack-outbound-attachment-is-empty","errorCode":null,"errorMessage":"Slack outbound attachment is empty: {}","messagePattern":"Slack outbound attachment is empty: (.+?)","errorType":"validation","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/zeroclaw-channels/src/slack.rs","lineNumber":1128,"sourceCode":"            mime_type,\n        })\n    }\n\n    async fn upload_outbound_attachment(\n        &self,\n        channel_id: &str,\n        thread_ts: Option<&str>,\n        attachment: &MediaAttachment,\n    ) -> anyhow::Result<()> {\n        if attachment.data.len() > SLACK_OUTBOUND_ATTACHMENT_MAX_BYTES {\n            anyhow::bail!(\n                \"Slack outbound attachment exceeds {} bytes: {}\",\n                SLACK_OUTBOUND_ATTACHMENT_MAX_BYTES,\n                attachment.file_name\n            );\n        }\n        if attachment.data.is_empty() {\n            anyhow::bail!(\n                \"Slack outbound attachment is empty: {}\",\n                attachment.file_name\n            );\n        }\n\n        let file_name = Self::sanitize_attachment_filename(&attachment.file_name)\n            .unwrap_or_else(|| \"attachment.bin\".to_string());\n        let length = attachment.data.len().to_string();\n        let upload_resp = self\n            .http_client()\n            .post(self.slack_api_url(\"files.getUploadURLExternal\"))\n            .bearer_auth(&self.bot_token)\n            .form(&[\n                (\"filename\", file_name.as_str()),\n                (\"length\", length.as_str()),\n            ])\n            .send()\n            .await?;","sourceCodeStart":1110,"sourceCodeEnd":1146,"githubUrl":"https://github.com/zeroclaw-labs/zeroclaw/blob/88bb9c8533fc57ed7a03e36ca7c9ed2bf8336dcc/crates/zeroclaw-channels/src/slack.rs#L1110-L1146","documentation":"Error \"Slack outbound attachment is empty: {}\" thrown in zeroclaw-labs/zeroclaw.","triggerScenarios":"Thrown at crates/zeroclaw-channels/src/slack.rs:1128 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check that the file being attached is not empty before calling Slack upload; regenerate or select a non-empty file."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"88bb9c8533fc57ed7a03e36ca7c9ed2bf8336dcc","analyzedAt":"2026-08-23T01:07:41.857Z","schemaVersion":2},"datasetVersion":"2026-08-23T08:06:27.607Z"}