SyntaxError: Illegal return statement #3995
Description
Prerequisites
- I have written a descriptive issue title
- I have searched existing issues to ensure the bug has not already been reported
Fastify version
4.0.0
Plugin version
No response
Node.js version
16.x
Operating system
macOS
Operating system version (i.e. 20.04, 11.3, 10)
12.4
Description
It seems that the generated file error-serializer.jsis not valid Javascript. The last line of the file is a return statement outside of a function.
SyntaxError: Illegal return statement
at Object.../../node_modules/fastify/lib/error-serializer.js
[...]
Manually commenting the last line allow to launch even with Webpack.
When I run my code using ts-node, no error is done. When the project is bundled with Webpack, one way or another, the whole code is evaluated, and the SyntaxError is thrown by node...
I definitly have no idea why Webpack is evaluating this code so soon (I'm not familiar enough with its "magic"), but anyway, returning outside of a function is no valid JS and this Error could be thrown later in the code I guess...
Steps to Reproduce
Main script
import fastify from 'fastify';
(async () => {
console.log('Start CLI !');
const fast = fastify({ logger: true });
await fast.listen({ port: 15987 });
})();Webpack config (both ts-loader or swc-loader throw the error)
const config: Configuration = {
mode: 'development',
target: 'node16',
entry: './main.ts',
context: FOLDER,
module: {
rules: [
{
test: /\.ts$/,
exclude: /(node_modules)/,
use: {
loader: 'swc-loader',
options: {
jsc: {
parser: {
syntax: 'typescript',
},
target: 'es2016',
},
},
},
},
// {
// test: /\.ts$/,
// exclude: /(node_modules)/,
// use: {
// loader: 'ts-loader',
// },
// },
],
},
resolve: {
extensions: ['.ts', '.tsx', '.js', '.jsx'],
},
};Expected Behavior
No error 0:-)