{"record":{"id":"354e4423a2288bae","repo":"xai-org/grok-build","slug":"required-file-path-string-line-int-characte","errorCode":null,"errorMessage":"Required: file_path (string), line (int), character (int).","messagePattern":"Required: file_path \\(string\\), line \\(int\\), character \\(int\\)\\.","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/codegen/xai-grok-tools/src/implementations/lsp/manager.rs","lineNumber":536,"sourceCode":"        &mut self,\n        input: &super::LspToolInput,\n    ) -> super::LspToolResult {\n        use super::{LspOperation, LspToolResult};\n\n        let err = |msg: String| LspToolResult {\n            text: msg,\n            is_error: true,\n        };\n\n        let result = match input.operation {\n            LspOperation::GoToDefinition\n            | LspOperation::FindReferences\n            | LspOperation::Hover\n            | LspOperation::GoToImplementation => {\n                let (Some(fp), Some(line), Some(col)) =\n                    (&input.file_path, input.line, input.character)\n                else {\n                    return err(\"Required: file_path (string), line (int), character (int).\".into());\n                };\n                let path = PathBuf::from(fp);\n                let Some(client) = self.client_for_file_mut(&path) else {\n                    return err(format!(\"No LSP server configured for {}\", path.display()));\n                };\n                match input.operation {\n                    LspOperation::GoToDefinition => client\n                        .goto_definition(&path, line, col)\n                        .await\n                        .map(|l| format_locations_labeled(\"Definition\", &l)),\n                    LspOperation::FindReferences => client\n                        .goto_references(&path, line, col)\n                        .await\n                        .map(|l| format_locations_labeled(\"References\", &l)),\n                    LspOperation::GoToImplementation => client\n                        .goto_implementation(&path, line, col)\n                        .await\n                        .map(|l| format_locations_labeled(\"Implementations\", &l)),","sourceCodeStart":518,"sourceCodeEnd":554,"githubUrl":"https://github.com/xai-org/grok-build/blob/bc7f02eddd3d84085849dc19ed216f11c23b0571/crates/codegen/xai-grok-tools/src/implementations/lsp/manager.rs#L518-L554","documentation":"The LSP tool (`dispatch_tool_typed` in the lsp manager) requires file_path, line, and character for position-based operations such as GoToDefinition, FindReferences, Hover, and GoToImplementation. If any of the three input fields is `None`, the tool returns 'Required: file_path (string), line (int), character (int).' without contacting any language server. It is a pure input-validation error.","triggerScenarios":"Invoking the LSP tool with `operation` set to FindReferences/Hover/GoToDefinition/GoToImplementation (and similar position-based ops) while omitting `file_path`, `line`, or `character` — e.g. only supplying file_path for a Hover call, or line without character (0-based vs 1-based confusion can also cause omitted fields).","commonSituations":"Agent/LLM constructing incomplete tool arguments; automation scripts assuming defaults for line/character; callers reusing a position-less payload template across operations; off-by-one edits that accidentally zero out or drop fields.","solutions":["Supply all three arguments: file_path (string), line (int), and character (int) for the requested operation.","Check which field was missing from the tool input payload and fix the caller that builds the arguments.","Confirm you are using a position-based operation; document/diagnostics-style operations may not need line/character.","Note line/character are typically 0-based LSP positions; verify your editor-derived values are not being dropped as invalid."],"exampleFix":"// before\n{ \"operation\": \"hover\", \"file_path\": \"src/main.rs\" }\n// after\n{ \"operation\": \"hover\", \"file_path\": \"src/main.rs\", \"line\": 10, \"character\": 4 }","handlingStrategy":"validation","validationCode":"// validate tool input before dispatch\nfunction assertPositionArgs(input) {\n  const posOps = [\"goto_definition\", \"find_references\", \"hover\", \"goto_implementation\"];\n  if (posOps.includes(input.operation) &&\n      !(typeof input.file_path === \"string\" &&\n        Number.isInteger(input.line) &&\n        Number.isInteger(input.character))) {\n    throw new Error(\"Required: file_path (string), line (int), character (int).\");\n  }\n}","typeGuard":"fn has_position(input: &LspToolInput) -> bool {\n    input.file_path.is_some() && input.line.is_some() && input.character.is_some()\n}","tryCatchPattern":"try {\n  const locs = await lspTool(input);\n} catch (e) {\n  if (String(e.message).includes(\"Required: file_path\")) {\n    console.error(\"lsp tool input missing position fields:\", input);\n  } else { throw e; }\n}","preventionTips":["Always pass file_path, line, and character together for position-based operations","Validate tool-call arguments with a schema before dispatch (agent tool JSON schema)","Remember LSP positions are 0-based; convert editor coordinates before sending","Don't reuse position-less payloads across operations"],"tags":["input-validation","missing-arguments","lsp","tool-parameters"],"backgroundTag":"missing-required-parameter","analyzedSha":"bc7f02eddd3d84085849dc19ed216f11c23b0571","analyzedAt":"2026-08-31T04:59:42.031Z","schemaVersion":2},"datasetVersion":"2026-08-31T09:17:48.483Z"}