cannot declare a var variable that shadows a let/const/class variable

[Enubia]

What version of Bun is running?

1.0.3+cc54b62fac41c0977c7dfc4c6ba550a6408fa15f

What platform is your computer?

Darwin 22.3.0 arm64 arm

What steps can reproduce the bug?

make-error-cause (dependency of gulp-uglify) throws during a gulp build pipeline.

Example to reproduce the issue.

const { src, dest, task } = require('gulp');
const uglify = require('gulp-uglify');
const plumber = require('gulp-plumber');

task('default', (done) => {
    src('./test.js')
        .pipe(plumber((err) => {
            console.log(err);
        }))
        .pipe(uglify())
        .pipe(dest('./dist/test.js'))
        .on('end', () => {
            console.log('end');
            done();
        });
});

What is the expected behavior?

../Workspace/dev-env/test-gulp❯ npx gulp   
[13:30:43] Using gulpfile /Volumes/Workspace/dev-env/test-gulp/gulpfile.js
[13:30:43] Starting 'default'...
end
[13:30:43] Finished 'default' after 22 ms

What do you see instead?

../Workspace/dev-env/test-gulp❯ bun gulpfile.js 
 8 | function makeErrorCause(value, _super) {
 9 |     if (_super === void 0) { _super = makeErrorCause.BaseError; }
10 |     return makeError(value, _super);
11 | }
12 | var makeErrorCause;
13 | (function (makeErrorCause) {
              ^
SyntaxError: Cannot declare a var variable that shadows a let/const/class variable: 'makeErrorCause'.
      at /Volumes/Workspace/dev-env/test-gulp/node_modules/make-error-cause/dist/index.js:13:10
../Workspace/dev-env/test-gulp❯ 

Additional information

No response

[Enubia]

nevermind me, I did not execute this script with bunx gulp but instead tried to run the gulpfile directly with bun gulpfile.js

[Enubia]

reopening because I think it could be still valid tho

in case you execute the provided script with either

node gulpfile.js

npx gulp

bunx gulp

it works as intended

but if you try to run the script via

bun gulpfile.js

the aforementioned error occurs

[paperdave]

transpiler bug, minimal repro. @dylan-conway

function A() {
}
var A;

[AxeemHaider]

still same error did you able to find solution of it @paperdave

[jlucaso1]

Same error when trying to run lib https://github.com/WhiskeySockets/Baileys/issues/586

var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
SyntaxError: Cannot declare a var variable that shadows a let/const/class variable: '__importStar'.

@paperdave @dylan-conway

[roysG]

Any update?

[Araxeus]

Same error when trying to run lib WhiskeySockets/Baileys#586

This is because of transpiling issues - Baileys define an __importStar function by itself before transpilation - https://github.com/WhiskeySockets/Baileys/blob/f25f83656a7cadbcdaf66b7fea72b9d4b3a72aa0/src/Utils/messages-media.ts#L785-L787 if you clone Baileys and directly run the ts files with Bun, you avoid this error (but you get other errors about missing function from Crypto)

[Jarred-Sumner]

Fixedin Bun v1.1.21