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• Would you like to work on a fix?

How are you using Babel?

@babel/cli

Input code

https://github.com/mozilla/web-ext , tag 7.5.0. Note that this bug can't be reproduced on x86-64 linux.

Configuration file name

.babelrc

Configuration

{
  "presets": [
    [
      "@babel/env",
      {
        "targets": { "node": "14" },
        // Leave import/export statements unchanged in the babel transpiling output.
        "modules": false
      }
    ],
    "@babel/flow"
  ],
  "plugins": [
    [
      "transform-inline-environment-variables",
      {
        "include": ["WEBEXT_BUILD_ENV"]
      }
    ]
  ],
  "env": {
    "test": {
      "plugins": ["istanbul"]
    }
  }
}

Current and expected behavior

Current Behavior

The the command npx babel src -d lib exited with code 1 and only one file got transformed. Additionally, the following content was logged to the console:

{ valid: true, value: null }

If we modify node_modules/@babel/cli/lib/babel/util.js to print the result of the call to transformFile:

function _compile() {
  _compile = _asyncToGenerator(function* (filename, opts) {
    opts = Object.assign({}, opts, {
    caller: CALLER
  });

  const result = yield new Promise((resolve, reject) => {
    babel().transformFile(filename, opts, (err, result) => {
+     console.log(`after transformFile, err:`, err, 'result:', result);
      if (err) reject(err);else resolve(result);
    });
  });
...

we can see the following output when babel starts transforming the second file:

after transformFile, err: { valid: true, value: null } result: undefined

Expected Behavior

All the files can be transformed successfully.

Environment

System: Arch Linux riscv64(in qemu-user)

System:
OS: Linux 6.2 undefined

Binaries:
Node: 19.8.0 - /usr/sbin/node
npm: 8.19.2 - /usr/sbin/npm

npmPackages:
@babel/cli: 7.20.7 => 7.20.7
@babel/core: 7.20.12 => 7.20.12
@babel/eslint-parser: 7.19.1 => 7.19.1
@babel/preset-env: 7.20.2 => 7.20.2
@babel/preset-flow: 7.18.6 => 7.18.6
@babel/register: 7.18.9 => 7.18.9
@babel/runtime: 7.20.13 => 7.20.13
babel-plugin-istanbul: 6.1.1 => 6.1.1
babel-plugin-transform-inline-environment-variables: 0.4.4 => 0.4.4
eslint: 8.32.0 => 8.32.0

Possible solution

After some debugging, I have found out that this bug comes from @babel/core/lib/config/caching.js.

This bug is a cache related bug and interestingly, if you put a console.log(); statement in the getCachedValue function:

function* getCachedValue(cache, arg, data){
  const cachedValue = cache.get(arg);
+ console.log();
if (cachedValue) {
...

Then everything works fine!

Additional context

I am packaging web-ext for Arch linux riscv64. Here is the complete build log: https://archriscv.felixc.at/.status/log.htm?url=logs/web-ext/web-ext-7.5.0-1.log