optimizer.simplify: true is wrongly stripping code it shouldn't

[dalimian]

Describe the bug

given this code const someVar = someNonExistentVarSoThisCodeShouldTriggerAnError;

when compiled with jsc.transform.optimizer.simplify set to true in .swcrc the above code is dropped from the compiled output. that seems wrong, optimization should not change any behavior. The end effect is that SWC is essentially silencing what would have been a loud failure.

side question, is optimizer.simplify feature considered stable

Input code

Config

{
  "$schema": "https://swc.rs/schema.json",
  "env": {
    "loose": true,
    "targets": [
      "current node"
    ],
  },
  "jsc": {
    "baseUrl": "../../../",
    "parser": {
      "syntax": "ecmascript",
      "jsx": true
    },
    "transform": {
      "react": {
        "development": false,
      },
      "optimizer": {
        "simplify": true,
        "globals": {
          "vars": {
            "NODE_ENV": "true"
          }
        }
      }
    },
    "paths": {
      "site-modules/*": [
        "./client/site-modules/*"
      ],
      "client/*": [
        "./client/*"
      ],
      "server/*": [
        "./server/*"
      ],
      "shared/*": [
        "./shared/*"
      ],
      "stubs/*": [
        "./stubs/*"
      ],
      "archetype/*": [
        "./archetype/*"
      ],
      "package.json/*": [
        "./package.json/*"
      ]
    },
  },
  "module": {
    "type": "commonjs",
  }
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.10.12&code=H4sIAAAAAAAAA0vOzysuUUhUsFUozs9N9cvPc63ILC5JzSsJSywKzg%2FJyCx2zk9JDc7IL81JCSnKTE9PLXLMcy0qyi%2By5koG600iW29%2BTqpeTn66RpImFwBhzhuZhwAAAA%3D%3D&config=H4sIAAAAAAAAA21QSQ7CMAy89xWVzxwACQ78gUdEwalSZZOdSpSqfydNk9JKXCJ7xjNjZ2raFnqW8GinVKYmCGKkrU8Ijy6Kd0IApRUsSYcIp8r2vFBKGMYMzSsDUVCHMav4er7cigKM94xVUTCrnVbjPlN6GwiZj4PLqHCdwf%2BJJBwrT3Zv5EPUVn8OFy03aRvMmhlpwELMTX2zJ1j%2FGnJY%2BZs4BlwvusNvqC6%2FLQqan1WZ3ecva2l8K2cBAAA%3D

SWC Info output

No response

Expected behavior

it should not drop the line

Actual behavior

No response

Version

1.10.12

Additional context

No response

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.