{"record":{"id":"5bbd420d3d6790cb","repo":"JuliusBrussee/caveman","slug":"repair-forgotten-predecessor-w","errorCode":null,"errorMessage":"repair forgotten predecessor: %w","messagePattern":"repair forgotten predecessor: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"mem/store.go","lineNumber":345,"sourceCode":"\t\treturn false, fmt.Errorf(\"forget begin: %w\", err)\n\t}\n\tdefer tx.Rollback()\n\n\tvar supersedes, supersededBy sql.NullString\n\tif err := tx.QueryRow(\n\t\t`SELECT supersedes, superseded_by FROM memories WHERE id = ?`, id,\n\t).Scan(&supersedes, &supersededBy); err != nil {\n\t\tif err == sql.ErrNoRows {\n\t\t\treturn false, nil\n\t\t}\n\t\treturn false, fmt.Errorf(\"read forgotten memory: %w\", err)\n\t}\n\tif supersedes.Valid {\n\t\tif _, err := tx.Exec(\n\t\t\t`UPDATE memories SET superseded_by = ? WHERE id = ?`,\n\t\t\tnullableLineageID(supersededBy), supersedes.String,\n\t\t); err != nil {\n\t\t\treturn false, fmt.Errorf(\"repair forgotten predecessor: %w\", err)\n\t\t}\n\t}\n\tif supersededBy.Valid {\n\t\tif _, err := tx.Exec(\n\t\t\t`UPDATE memories SET supersedes = ? WHERE id = ?`,\n\t\t\tnullableLineageID(supersedes), supersededBy.String,\n\t\t); err != nil {\n\t\t\treturn false, fmt.Errorf(\"repair forgotten successor: %w\", err)\n\t\t}\n\t}\n\tif _, err := tx.Exec(`DELETE FROM memories WHERE id = ?`, id); err != nil {\n\t\treturn false, fmt.Errorf(\"forget: %w\", err)\n\t}\n\tif err := tx.Commit(); err != nil {\n\t\treturn false, fmt.Errorf(\"forget commit: %w\", err)\n\t}\n\treturn true, nil\n}","sourceCodeStart":327,"sourceCodeEnd":363,"githubUrl":"https://github.com/JuliusBrussee/caveman/blob/766dce6b1394ebb56a3090748d5a0240a5aefb36/mem/store.go#L327-L363","documentation":"The UPDATE repairing the forgotten memory's predecessor's superseded_by pointer failed inside the Forget transaction. The wrapped error is the SQLite failure; rollback keeps lineage intact.","triggerScenarios":"Thrown at mem/store.go:345 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Retry the forget","Check db locks/writability"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"766dce6b1394ebb56a3090748d5a0240a5aefb36","analyzedAt":"2026-08-18T03:14:35.516Z","contentChangedAt":"2026-08-18T03:14:35.516Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}