{"record":{"id":"dfd6c1148c68504e","repo":"BigPizzaV3/CodexPlusPlus","slug":"failed-to-allocate-a-stale-dream-skin-backup-path","errorCode":null,"errorMessage":"failed to allocate a stale Dream Skin backup path","messagePattern":"failed to allocate a stale Dream Skin backup path","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/codex-plus-core/src/dream_skin.rs","lineNumber":627,"sourceCode":"            String::new()\n        } else {\n            format!(\"-{attempt}\")\n        };\n        let isolated = backup_path.with_file_name(format!(\n            \"dream-skin-base-theme-backup.stale-{timestamp}{suffix}.json\"\n        ));\n        if isolated.exists() {\n            continue;\n        }\n        std::fs::rename(backup_path, &isolated).with_context(|| {\n            format!(\n                \"failed to isolate stale Dream Skin backup {}\",\n                backup_path.display()\n            )\n        })?;\n        return Ok(isolated);\n    }\n    bail!(\"failed to allocate a stale Dream Skin backup path\")\n}\n\nfn read_config_or_empty(path: &Path) -> anyhow::Result<String> {\n    match std::fs::read_to_string(path) {\n        Ok(contents) => Ok(contents),\n        Err(error) if error.kind() == std::io::ErrorKind::NotFound => Ok(String::new()),\n        Err(error) => Err(error).with_context(|| format!(\"failed to read {}\", path.display())),\n    }\n}\n\nfn parse_config(contents: &str, path: &Path) -> anyhow::Result<DocumentMut> {\n    contents\n        .parse::<DocumentMut>()\n        .with_context(|| format!(\"failed to parse {}\", path.display()))\n}\n\nfn write_config(path: &Path, bytes: &[u8]) -> anyhow::Result<()> {\n    crate::settings::atomic_write(path, bytes).with_context(|| {","sourceCodeStart":609,"sourceCodeEnd":645,"githubUrl":"https://github.com/BigPizzaV3/CodexPlusPlus/blob/b1ed92e5e4a2d74095d4b8db5af43cef7acba9c6/crates/codex-plus-core/src/dream_skin.rs#L609-L645","documentation":"isolate_stale_backup moves an orphaned Dream Skin base-theme backup (dream-skin-base-theme-backup.json) out of the way by renaming it to a timestamped *.stale-*.json path. It tries the plain timestamped name and up to 100 numbered variants; if all 100 candidate names already exist on disk, it gives up with this bail. It is a defensive exhaustion error — effectively 'cannot find a free filename for the stale backup after 100 attempts'.","triggerScenarios":"Called from apply_base_theme or restore_base_theme when the existing backup file's identity is BackupIdentity::Stale (a leftover backup pointing at a different, now-nonexistent config path). The bail fires only when all 100 candidate names dream-skin-base-theme-backup.stale-{timestamp}{,-1..-99}.json already exist in the same directory.","commonSituations":"An extremely fast loop re-applying themes many times within the same millisecond timestamp while leftover stale backups accumulate; a directory flooded with thousands of stale backup files from repeated crashed/failed applies; a filesystem where exists() misreports (e.g. permission-restricted directory or unusual mounts) so every candidate appears to exist.","solutions":["List and delete (or archive) old dream-skin-base-theme-backup.stale-*.json files in the codex config directory to free up candidate names.","Re-run the apply/restore operation — a new millisecond timestamp changes the candidate names, so this is almost always transient.","Check the directory is writable and not a weird mount; verify with a manual rename of the stale backup file.","If it recurs, manually move the original dream-skin-base-theme-backup.json aside yourself, then retry."],"exampleFix":"// before (all 100 candidate names taken)\nbail!(\"failed to allocate a stale Dream Skin backup path\")\n// after (user-side recovery)\n// rm ~/.codex/dream-skin-base-theme-backup.stale-*.json && retry apply_base_theme","handlingStrategy":"try-catch","validationCode":"let stale_count = std::fs::read_dir(config_dir)?\n    .filter_map(|e| e.ok())\n    .filter(|e| e.file_name().to_string_lossy().starts_with(\"dream-skin-base-theme-backup.stale-\"))\n    .count();\nif stale_count > 90 { /* clean up stale backups before applying */ }","typeGuard":null,"tryCatchPattern":"match apply_base_theme(...) {\n    Err(e) if e.to_string().contains(\"failed to allocate a stale Dream Skin backup path\") => {\n        // purge dream-skin-base-theme-backup.stale-*.json, then retry once\n    }\n    other => other?,\n}","preventionTips":["Periodically purge old dream-skin-base-theme-backup.stale-*.json files from the codex config directory.","Investigate root causes of repeated apply/restore failures that leave stale backups behind.","Avoid tight loops that call apply_base_theme many times per millisecond."],"tags":["filesystem","backup","name-collision","rust"],"backgroundTag":"file-already-exists","analyzedSha":"b1ed92e5e4a2d74095d4b8db5af43cef7acba9c6","analyzedAt":"2026-09-19T23:35:21.129Z","contentChangedAt":"2026-09-19T23:35:21.129Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}