[Bug]: export * as name syntax causes babel to fail with unhandled error when using plugin-transform-modules-commonjs #13273
Description
💻
- Would you like to work on a fix?
How are you using Babel?
@babel/cli
Input code
Consider a 2-file project:
// main.ts
export * as utils from './utils';
// utils.ts
export const num = 42;Instead writing:
import * as utils from './utils';
export {utils}works without issues.
Configuration file name
babel.config.js
Configuration
module.exports = {
ignore: [
"node_modules/**/*.ts",
"**/*.d.ts"
],
"presets": ["@babel/preset-typescript"],
"plugins": [
[
"@babel/plugin-transform-modules-commonjs",
{
loose: true,
noInterop: true
}
]
]
}Current and expected behavior
Current behaviour:
TypeError: /path/to/project/main.ts: Cannot read property 'name' of undefined
at /path/to/project/node_modules/@babel/helper-module-transforms/lib/normalize-and-load-metadata.js:274:51
at Array.forEach (<anonymous>)
at /path/to/project/node_modules/@babel/helper-module-transforms/lib/normalize-and-load-metadata.js:273:33
at Array.forEach (<anonymous>)
at getLocalExportMetadata (/path/to/project/node_modules/@babel/helper-module-transforms/lib/normalize-and-load-metadata.js:261:27)
at getModuleMetadata (/path/to/project/node_modules/@babel/helper-module-transforms/lib/normalize-and-load-metadata.js:113:21)
at normalizeModuleAndLoadMetadata (/path/to/project/node_modules/@babel/helper-module-transforms/lib/normalize-and-load-metadata.js:59:7)
at rewriteModuleStatementsAndPrepareHeader (/path/to/project/node_modules/@babel/helper-module-transforms/lib/index.js:79:54)
at PluginPass.exit (/path/to/project/node_modules/@babel/plugin-transform-modules-commonjs/lib/index.js:149:83)
at newFn (/path/to/project/node_modules/@babel/traverse/lib/visitors.js:175:21) {
code: 'BABEL_TRANSFORM_ERROR'
Expected behaviour:
Should compile without issue, or at least throw a meaningful error message.
The code compiles without issue with tsc.
Environment
System:
OS: macOS 11.0
Binaries:
Node: 15.13.0 - /opt/homebrew/bin/node
npm: 7.7.6 - /opt/homebrew/bin/npm
npmPackages:
@babel/cli: ^7.13.16 => 7.13.16
@babel/core: ^7.14.0 => 7.14.0
@babel/plugin-transform-modules-commonjs: ^7.14.0 => 7.14.0
@babel/preset-typescript: ^7.13.0 => 7.13.0
eslint: ^7.10.0 => 7.25.0
Possible solution
No response
Additional context
Small changes to babel.config.js such as removing plugin-transform-modules-commonjs parameters causes babel to fail with a meaningful error message.
Also the issue goes away entirely when not using plugin-transform-modules-commonjs.