Struggling to compile

[0x80]

I am using your plugin in combination with create-react-app-typescript, in order to compile mem in production. When adding babel-engine-plugin I am left with a very vague webpack compiler error:

Failed to compile.

chunk main [entry] static/js/[name].[chunkhash:8].js Cannot read property 'indexOf' of null

I've been diving into various bits of code, trying out different things, but I am running out of ideas and energy. I'm hoping anyone might recognise this and point me in the right direction.

My setup has been compiling fine without the plugin. I can still do the non-production build, because it doesn't use the Uglify plugin. It's the Uglify plugin that clashes with the syntax of mem, but I guess that is not something unusual.

Below is my config-overrides file, in case that helps.

const { injectBabelPlugin, getLoader } = require("react-app-rewired");
const path = require("path");
const BabelEnginePlugin = require("babel-engine-plugin");

module.exports = function override(config, env) {
  const babelLoader = {
    loader: "babel-loader",
    options: {
      presets: ["react-app"],
    },
  };

  const babelEnginePlugin = new BabelEnginePlugin({
    presets: ["env"],
  });

  const tsLoader = getLoader(
    config.module.rules,
    rule =>
      rule.loader &&
      typeof rule.loader === "string" &&
      rule.loader.indexOf(`${path.sep}ts-loader${path.sep}`) !== -1
  );

  if (!tsLoader) {
    throw new Error("Unable to find ts-loader in the webpack config base");
  }
  tsLoader.loader = undefined; // remove loader in favor of use
  tsLoader.use = [
    babelLoader,
    {
      loader: "ts-loader",
    },
  ];

  config.plugins.unshift(babelEnginePlugin);

  // For imports with non-relative path from /src
  config.resolve.modules = [path.resolve("src")].concat(config.resolve.modules);
  config.resolve.extensions = [".tsx", ".ts", ".json", ".js"];
  return config;
};

[thasmo]

Having the same problem on production builds but I'm not sure it's related to Uglify. When Uglify is disabled the problem persists. Development builds work fine.

[thasmo]

#5 seems to be a fix for this. @SamVerschueren, any chance this gets merged and released? I really like this babel plugin, but the current issue is a blocker because production builds fail.

[SamVerschueren]

Reviewed the PR. Two things that need to be fixed first.

[thasmo]

Awesome, thanks for looking into it!

[SamVerschueren]

Can you give it a go with 0.2.0, PR #5 is merged now.