ErrLookup › microsoft/TypeScript
microsoft/TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output. · TypeScript · 737 source files
Analyzed at b465fdbfe1 on 2026-08-12. 82 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| tsserverlibrary requires CommonJS; use typescript.js instead | exception | error | build, commonjs, esm, browser, tsserverlibrary |
| LKG cannot be created when --bundle=false | exception | error | build, lkg, bundle, hereby |
| Cannot replace the LKG unless all built targets are present | exception | error | build, lkg, validation, localization |
| Unexpected tag name '${tag}'. | exception | error | release, publish, validation, prerelease |
| \n '${tsFilePath}' was not updated while configuring for a | exception | error | release, publish, idempotency, prerelease |
| patch does not match. ${tsFilePath}: '${parsedPatch}; packag | exception | error | release, version, validation, prerelease |
| Failed to update status comment | exception | error | ci, github-api, network, release, retry |
| Diagnostic code ${code} appears more than once. | exception | error | diagnostics, build, validation, codegen |
| Expected ${inputDir} to be a directory | exception | error | lkg, localization, build, validation |
| Expected ${inputFile} to be a file | exception | error | lkg, localization, build, validation |
| ${task[0]} ${task[1].join(" ")} failed: ${result.stderr && " | exception | error | build, subprocess, orchestration, release |
| Function expected | exception | error | decorators, runtime, emit-helpers, es-decorators |
| Cannot add initializers after decoration has completed | exception | error | decorators, runtime, emit-helpers, initializers |
| Object expected | exception | error | decorators, accessor, runtime, emit-helpers |
| Symbol.asyncIterator is not defined. | exception | error | async, runtime, polyfill, target, emit-helpers |
| Class extends value ${String(b)} is not a constructor or nul | exception | error | classes, inheritance, runtime, emit-helpers |
| Object is not iterable. | exception | error | iteration, runtime, emit-helpers |
| Symbol.iterator is not defined. | exception | error | iteration, runtime, polyfill, target, emit-helpers |
| Generator is already executing. | exception | error | generators, runtime, emit-helpers |
| Private accessor was defined without a getter | exception | error | private-fields, runtime, downlevel, accessor, emit-helpers |
| Cannot read private member from an object whose class did no | exception | error | private-fields, runtime, downlevel, brand-check, emit-helpers |
| Private method is not writable | exception | error | private-fields, runtime, downlevel, method, emit-helpers |
| Private accessor was defined without a setter | exception | error | private-fields, runtime, downlevel, accessor, emit-helpers |
| Cannot write private member to an object whose class did not | exception | error | private-fields, runtime, downlevel, brand-check, emit-helpers |
| Cannot use 'in' operator on non-object | exception | error | private-fields, runtime, downlevel, in-operator, emit-helpers |
| Object expected. | exception | error | disposable, using, runtime, downlevel, emit-helpers |
| Symbol.asyncDispose is not defined. | exception | error | disposable, async-disposable, using, runtime, polyfill, emit-helpers |
| Symbol.dispose is not defined. | exception | error | disposable, using, runtime, polyfill, emit-helpers |
| Object not disposable. | exception | error | disposable, using, runtime, emit-helpers |
| Could not resolve JS module '${moduleName}' starting at '${i | exception | error | module-resolution, compiler-api, node-modules, configuration |
| ${option.name} is a string value; tsconfig JSON must be pars | exception | error | compiler-api, createprogram, configuration, tsconfig, options |
| tracing requires having fs\n(original error: ${e.message || | exception | error | tracing, runtime, fs, bundler, compiler-api |
| start < 0 | exception | error | textspan, compiler-api, internal-invariant, position |
| length < 0 | exception | error | textspan, compiler-api, internal-invariant, position |
| newLength < 0 | exception | error | textspan, textchangerange, compiler-api, internal-invariant, incremental |
| DeprecationError: '${name}' has been deprecated since v${sin | exception | error | deprecation, compat, versioning, migration |
| Invalid arguments | exception | error | overloads, deprecation, compat, type-narrowing |
| verifyCurrentLineContent\n | exception | error | test-harness, fourslash, assertion, formatting |
| verifyFileContent in file '${fileName}' failed:\n${showTextD | exception | error | test-harness, fourslash, assertion, baseline |
| verifyTextAtCaretIs\n | exception | error | fourslash, test-assertion, caret-position |
| You need to change the source code of fourslash test to use | exception | error | fourslash, migration, semantic-classification, test-authoring |
| Exactly one refactor range is allowed per test. | exception | error | fourslash, refactor, test-configuration, range-markers |
| File index (${index}) in openFile was out of range. There ar | exception | error | fourslash, file-management, index-out-of-range |
| No test file named "${indexOrName}" exists. Available file n | exception | error | fourslash, file-management, name-mismatch |
| Unknown marker "${markerName}" Available markers: ${this.get | exception | error | fourslash, markers, name-mismatch |
| Syntax error in ${absoluteBasePath}: ${output.diagnostics![0 | exception | error | fourslash, test-syntax, transpile-error |
| Three-slash line in the middle of four-slash region at line | exception | error | fourslash, test-parsing, comment-syntax |
| Global option '${key}' already exists | exception | error | fourslash, test-parsing, configuration, duplicate-option |
| ${fileName}(${line},${col}): ${message} | exception | error | fourslash, test-parsing, marker-syntax, range-syntax |
| Did you mean to put 'preferences' in the previous 'verify.co | exception | error | fourslash, completions, api-misuse, preferences |
| Cannot call andApplyCodeAction on multiple completions reque | exception | error | fourslash, completions, api-misuse, code-action |
| Cannot have undefined value for compiler option '${name}'. | exception | error | harness, compiler-options, configuration, undefined-value |
| Unknown value '${value}' for compiler option '${name}'. | exception | error | harness, compiler-options, configuration, invalid-value |
| Unknown compiler option '${name}'. | exception | error | harness, compiler-options, configuration, unknown-option |
| Value must be a number, got: ${JSON.stringify(value)} | exception | error | harness, compiler-options, configuration, type-mismatch |
| Only declaration files should be generated when emitDeclarat | exception | error | harness, compiler-output, declaration, emit, emit-declaration-only |
| There were no errors and declFiles generated did not match n | exception | error | harness, compiler-output, declaration, emit, file-count-mismatch |
| No sourcemap files should be generated if inlineSourceMaps w | exception | error | harness, compiler-output, sourcemap, inline-sourcemap, declaration-map |
| Number of sourcemap files should be same as js files. | exception | error | harness, compiler-output, sourcemap, file-count-mismatch |
| Expected at least one js file to be emitted or at least one | exception | error | test-harness, baseline, emit, compiler-options |
| Variations in test option '@${varyBy}' resulted in an empty | exception | error | test-harness, test-options, varyby, configuration |
| Provided test options exceeded the maximum number of variati | exception | error | test-harness, test-options, varyby, combinatorial |
| Non-comment test content appears before the first '// @Filen | exception | error | test-harness, test-parser, multifile-test, authoring |
| The baseline file ${relativeFileName} has changed. (Run "her | exception | error | test-harness, baseline, diff, regression |
| New baseline created at ${IO.joinPath("tests", "baselines", | exception | error | test-harness, baseline, first-time, accept |
| The generated content was "undefined". Return "null" if no b | exception | error | test-harness, baseline, null-undefined, api-contract |
| The baseline for ${relativeFileBase} in ${errors.length} fil | exception | error | test-harness, baseline, multifile, aggregated |
| No script with name '" + fileName + "' | exception | error | test-harness, language-service, script-info, setup |
| getClassifier is not available using the server interface. | exception | error | test-harness, language-service, server-adapter, unsupported-api |
| getPreProcessedFileInfo is not available using the server in | exception | error | test-harness, language-service, server-adapter, unsupported-api |
| Cannot shadow a mutable file system. | exception | error | test-harness, vfs, readonly, filesystem |
| Cannot create a case-insensitive file system from a case-sen | exception | error | test-harness, vfs, case-sensitivity, filesystem |
| Request: ${request.command} not allowed in LanguageServiceMo | exception | error | server, tsserver, server-mode, protocol |
| Request: ${request.command} not allowed in LanguageServiceMo | exception | error | server, tsserver, server-mode, protocol |
| No Project. | exception | error | server, tsserver, project, lifecycle |
| The project's language service is disabled. | exception | error | server, tsserver, project, resource-limits, language-service |
| Project '${project.getProjectName()}' does not contain docum | exception | error | server, tsserver, project, script-info, routing |
| Could not find file: '${fileName}'. | exception | error | language-service, host, script-snapshot, embedding |
| LanguageService Operation: ${key} not allowed in LanguageSer | exception | error | language-service, semantic-mode, diagnostics, typescript |
| LanguageService Operation: ${key} not allowed in LanguageSer | exception | error | language-service, semantic-mode, intellisense, typescript |
| getDefaultLibFilePath is only supported when consumed as a n | exception | error | compiler-host, sys, browser, node, lib-d-ts |
| Invalid name for template cancellation pipe: it should have | exception | error | tsserver, named-pipe, cancellation, command-line, windows |