JSDoc `@import` causes `getCompletionEntryDetails` to crash

🔎 Search Terms

jsdoc

The supplied value [object Object] did not pass the test 'isTypeKeywordToken'

🕗 Version & Regression Information

At least since TypeScript 5.5.0.

Since @import has been introduced in TypeScript 5.5.0 it does not make sense to look further back than that.

⏯ Playground Link

No response

💻 Code

tl;dr

try to run getCompletionsAtPosition on this file main.js:

/** @import * as t from '/types.ts' */

import { preventDefault } from "/other-file.js";

p

jsconfig.json

{
  "compilerOptions": {
    "checkJs": true,
    "strict": true,
    "paths": {
      "/*": ["./*"],
    },
    "allowImportingTsExtensions": true
  },
    "include": ["**/*.js", "**/*.ts"],
}

other-file.js

export function preventDefault() {
  
}

types.ts

export {};

And it will crash.

Here is a ChatGPT generated reproduction that should be self-contained:

#!/usr/bin/env ts-node

import fs from "fs";
import os from "os";
import path from "path";
import * as ts from "typescript";

// -------------------------------------------------------------------------------------
// Default jsconfig.json content to embed
// -------------------------------------------------------------------------------------
const defaultJsconfig = {
  compilerOptions: {
    checkJs: true,
    strict: true,
    paths: {
      "/*": ["./*"]
    },
    allowImportingTsExtensions: true
  },
  include: ["**/*.js", "**/*.ts"]
};

// -------------------------------------------------------------------------------------
// Create synthetic project in a temp folder
// -------------------------------------------------------------------------------------
function createTempProject(): string {
  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "ts-crash-"));

  // Write the embedded jsconfig.json
  fs.writeFileSync(
    path.join(tempDir, "jsconfig.json"),
    JSON.stringify(defaultJsconfig, null, 2),
    "utf8"
  );

  // Dummy supporting files
  fs.writeFileSync(
    path.join(tempDir, "types.ts"),
    "export interface Foo { bar: string }\nexport const baz = 42;\n",
  );
  fs.writeFileSync(
    path.join(tempDir, "other-file.js"),
    "export function preventDefault() {}\n"
  );

  // main.js with your exact snippet (absolute imports!)
  fs.writeFileSync(
    path.join(tempDir, "main.js"),
    `/** @import * as t from '/types.ts' */\n\nimport { preventDefault } from "/other-file.js";\n\np`
  );

  return tempDir;
}

// -------------------------------------------------------------------------------------
// Build a Language-Service that *pretends* absolute paths exist but empty
// -------------------------------------------------------------------------------------
function createLanguageService(root: string): import("typescript").LanguageService {
  const files = new Map<string, { text: string; version: number }>();

  const addFile = (filePath: string) => {
    const full = path.resolve(root, filePath);
    files.set(full, { text: fs.readFileSync(full, "utf8"), version: 0 });
  };
  ["main.js", "types.ts", "other-file.js"].forEach(addFile);

  const host: import("typescript").LanguageServiceHost = {
    getCompilationSettings: () => ({
      allowJs: true,
      checkJs: true,
      ...defaultJsconfig.compilerOptions,
      target: ts.ScriptTarget.ES2022
    }),
    getScriptFileNames: () => Array.from(files.keys()),
    getScriptVersion: (f) => `${files.get(f)?.version ?? 0}`,
    getScriptSnapshot: (f) => {
      const entry = files.get(f);
      if (entry) return ts.ScriptSnapshot.fromString(entry.text);
      // Pretend absolute‑path imports exist but are empty strings
      if (f.startsWith(path.sep)) return ts.ScriptSnapshot.fromString("");
      return undefined;
    },
    getCurrentDirectory: () => root,
    getDefaultLibFileName: (o) => ts.getDefaultLibFilePath(o),
    fileExists: (f) => files.has(f) || f.startsWith(path.sep),
    readFile: (f) => files.get(f)?.text ?? "",
    readDirectory: ts.sys.readDirectory,
    useCaseSensitiveFileNames: () => ts.sys.useCaseSensitiveFileNames,
  };

  return ts.createLanguageService(host, ts.createDocumentRegistry());
}

// -------------------------------------------------------------------------------------
// Attempt the crash reproduction
// -------------------------------------------------------------------------------------
function main() {
  console.log(`Using TypeScript ${ts.version}`);

  const projectDir = createTempProject();
  const ls = createLanguageService(projectDir);
  const targetFile = path.join(projectDir, "main.js");
  const src = fs.readFileSync(targetFile, "utf8");
  const pos = src.lastIndexOf("p") + 1;

  const completionInfo = ls.getCompletionsAtPosition(targetFile, pos, {
    includeExternalModuleExports: true,
    includeInsertTextCompletions: true,
  });

  if (!completionInfo) {
    console.error("No completions returned – cannot proceed.");
    return;
  }

  console.log(`Entries: ${completionInfo.entries.length}\n`);
  console.log("Running two passes (with & without entry.data)…\n");

  const run = (withData: boolean) => {
    console.log(withData ? "— WITH data —" : "— data = undefined —");
    completionInfo.entries.forEach((entry) => {
      try {
        const details = ls.getCompletionEntryDetails(
          targetFile,
          pos,
          entry.name,
          {},
          entry.source,
          {},
          withData ? entry.data : undefined,
        );
      } catch (e) {
        console.error(`✗ ${entry.name}  →  ${(e as Error).message}`);
        console.error((e as Error).stack);
      }
    });
    console.log();
  };

  run(true);
  run(false);

  console.log(`Temp project retained at: ${projectDir}`);
}

main();

🙁 Actual behavior

Crash!

Running two passes (with & without entry.data)…

— WITH data —
✗ t → Debug Failure. Invalid cast. The supplied value [object Object] did not pass the test 'isTypeKeywordToken'.
Error: Debug Failure. Invalid cast. The supplied value [object Object] did not pass the test 'isTypeKeywordToken'.
at cast (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:3350:16)
at getTypeKeywordOfTypeOnlyImport (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:139958:10)
at promoteImportClause (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158612:32)
at promoteFromTypeOnly (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158602:7)
at codeActionForFixWorker (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158558:35)
at /Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158501:13
at _ChangeTracker.with (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:178070:5)
at codeActionForFix (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158500:60)
at Object.getPromoteTypeOnlyCompletionAction (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:157905:43)
at getCompletionEntryCodeActionsAndSourceDisplay (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:167744:44)

— data = undefined —
✗ t → Debug Failure. Invalid cast. The supplied value [object Object] did not pass the test 'isTypeKeywordToken'.
Error: Debug Failure. Invalid cast. The supplied value [object Object] did not pass the test 'isTypeKeywordToken'.
at cast (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:3350:16)
at getTypeKeywordOfTypeOnlyImport (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:139958:10)
at promoteImportClause (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158612:32)
at promoteFromTypeOnly (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158602:7)
at codeActionForFixWorker (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158558:35)
at /Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158501:13
at _ChangeTracker.with (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:178070:5)
at codeActionForFix (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:158500:60)
at Object.getPromoteTypeOnlyCompletionAction (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:157905:43)
at getCompletionEntryCodeActionsAndSourceDisplay (/Users/bart/src/sqlife/repro/node_modules/typescript/lib/typescript.js:167744:44)

🙂 Expected behavior

No crash

Additional information about the issue

No response