{"record":{"id":"e1705cdbff4ab468","repo":"BoundaryML/baml","slug":"failed-to-update-runtime-after-reloading-files-e","errorCode":null,"errorMessage":"Failed to update runtime after reloading files: {e}","messagePattern":"Failed to update runtime after reloading files: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"engine/language_server/src/session.rs","lineNumber":273,"sourceCode":"                tracing::info!(\n                    \"Loaded {} files for project root: {:?}\",\n                    files_map.len(),\n                    project_root\n                );\n\n                {\n                    let default_flags = vec![\"beta\".to_string()];\n                    project.lock().update_runtime(\n                        notifier.clone(),\n                        self.baml_settings\n                            .feature_flags\n                            .as_ref()\n                            .unwrap_or(&default_flags),\n                    )\n                }\n                .map_err(|e| {\n                    tracing::error!(\"Failed to update runtime after reloading files: {e}\");\n                    anyhow::anyhow!(\"Failed to update runtime after reloading files: {e}\")\n                })?;\n                Ok(files_map)\n            })\n            .collect::<anyhow::Result<Vec<_>>>()?;\n\n        let total_files: usize = project_updates.iter().map(|m| m.len()).sum();\n        tracing::info!(\n            \"Initial reload complete: {} projects, {} total files\",\n            project_updates.len(),\n            total_files\n        );\n\n        // Guard no longer used. We can drop now instead of waiting for the end\n        // of scope.\n        drop(baml_src_projects);\n\n        let files: Vec<(DocumentKey, String)> = project_updates\n            .into_iter()","sourceCodeStart":255,"sourceCodeEnd":291,"githubUrl":"https://github.com/BoundaryML/baml/blob/bd85ce9dee1463ff04d27efd20531013a4ff46c1/engine/language_server/src/session.rs#L255-L291","documentation":"After reload reloads files, it rebuilds each project's runtime; a failure updating the runtime (e.g. errors compiling the BAML schema into a runtime) is logged via tracing::error! and surfaced as 'Failed to update runtime after reloading files'. It indicates the reloaded sources are inconsistent or invalid for runtime construction.","triggerScenarios":"load_files succeeded but update_runtime fails: BAML source with syntax/type errors introduced on disk, inconsistent partial file states mid-reload, or feature-flag configuration incompatible with the new sources.","commonSituations":"Saving a broken .baml file while the LSP watches the directory; git branch switch leaving transiently invalid sources; feature_flags in settings that no longer match the reloaded schema.","solutions":["Read the inner error to find the offending BAML file/diagnostic","Fix the BAML syntax/type errors in the reloaded sources","Check baml_settings.feature_flags match the current schema version","Retry the reload (or restart the server) once sources are valid"],"exampleFix":"// before: broken baml on disk\nfunction Foo { prompt #\"...\" } // malformed\n// after: valid definition\nfunction Foo() -> string { client GPT4o prompt #\"hi\" }","handlingStrategy":"try-catch","validationCode":"// validate baml files compile (e.g. via CLI) before reload\n$ baml-cli validate ./baml_src","typeGuard":null,"tryCatchPattern":"try { await triggerReload(); } catch (e) { if (String(e).includes('update runtime')) { showDiagnostics(e.cause); /* fix sources, then */ await triggerReload(); } else throw e; }","preventionTips":["Fix BAML syntax/type errors promptly; check diagnostics panel","Keep feature_flags in settings aligned with schema version","Avoid branch switches that leave partially valid sources mid-reload","Run baml CLI validation in CI"],"tags":["lsp","runtime","reload","rust"],"backgroundTag":"internal-invariant-violation","analyzedSha":"bd85ce9dee1463ff04d27efd20531013a4ff46c1","analyzedAt":"2026-09-12T03:38:25.718Z","contentChangedAt":"2026-09-12T03:38:25.718Z","schemaVersion":2},"datasetVersion":"2026-09-14T11:17:12.474Z"}