TypeError: Cannot read property 'callAsync' of undefined on webpack.watch

[jrmccannon]

Issue:
ForkTsCheckerWebpackPlugin is causing the webpack.watch reload to throw the following error:

\node_modules\fork-ts-checker-webpack-plugin\lib\index.js:223
                _this.compiler.hooks.forkTsCheckerServiceBeforeStart.callAsync(function () {
                                                                    ^

TypeError: Cannot read property 'callAsync' of undefined
    at Proxy.<anonymous> (.\node_modules\fork-ts-checker-webpack-plugin\lib\index.js:223:69)
    at args (.\node_modules\speed-measure-webpack-plugin\WrappedPlugin\index.js:52:19)
    at SyncHook.eval [as call] (eval at create (.\node_modules\tapable\lib\HookCodeFactory.js:19:10), <anonymous>:7:1)
    at hooks.beforeCompile.callAsync.err (.\node_modules\webpack\lib\Compiler.js:532:23)
    at AsyncSeriesHook.eval [as callAsync] (eval at create (.\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:6:1)
    at Compiler.compile (.\node_modules\webpack\lib\Compiler.js:529:28)
    at compiler.hooks.watchRun.callAsync.err (.\node_modules\webpack\lib\Watching.js:77:18)
    at _err0 (eval at create (.\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:20:1)
    at func.apply.argsButLast.map.concat.callbackArgs (.\node_modules\speed-measure-webpack-plugin\WrappedPlugin\index.js:44:9)
    at Proxy.watchRun (.\node_modules\fork-ts-checker-webpack-plugin\lib\index.js:140:13)
    at args (.\node_modules\speed-measure-webpack-plugin\WrappedPlugin\index.js:40:16)
    at AsyncSeriesHook.eval [as callAsync] (eval at create (.\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:7:1)
    at Watching._go (.\node_modules\webpack\lib\Watching.js:40:32)
    at Watching._invalidate (.\node_modules\webpack\lib\Watching.js:165:9)
    at watcher.compiler.watchFileSystem.watch (.\node_modules\webpack\lib\Watching.js:136:10)
    at Watchpack.watcher.once (.\node_modules\webpack\lib\node\NodeWatchFileSystem.js:54:4)
    at Object.onceWrapper (events.js:318:30)
    at emitTwo (events.js:125:13)
    at Watchpack.emit (events.js:213:7)
    at Watchpack._onTimeout (.\node_modules\watchpack\lib\watchpack.js:144:7)
    at ontimeout (timers.js:469:11)
    at tryOnTimeout (timers.js:304:5)
    at Timer.listOnTimeout (timers.js:264:5)

Everything bundles fine the first time. But on reload, it exits with that error.
When commenting out ForkTsCheckerWebpackPlugin, webpack.watch works fine.

Here's my webpack.config.js

const path = require('path');
const webpack = require('webpack');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');

const SpeedMeasurePlugin = require("speed-measure-webpack-plugin");
const smp = new SpeedMeasurePlugin();

const VueLoaderPlugin = require("vue-loader/lib/plugin");

module.exports = smp.wrap({
    entry: {
        /** multiple entry points **/
    },
    optimization: {
        splitChunks: {
            cacheGroups: {
                vendors: {
                    name: "vendor",
                    chunks: "initial",
                    test: /[\\/]node_modules[\\/]/
                },
                commons: {
                    name: "common",
                    chunks: "initial",
                    minChunks: 2
                }
            }
        }
    },
    output: {
        path: path.resolve(__dirname, './dist'),
        pathinfo: false,
        publicPath: '/dist/',
        filename: '[name].bundle.js'
    },
    plugins: [        
        new ForkTsCheckerWebpackPlugin({vue: true,tslint: false,workers: 2}),
        new VueLoaderPlugin(),
        new webpack.IgnorePlugin(/** external libraries **/)
    ],
    module: {
        rules: [
            {
                test: /\.vue$/,
                loader: 'vue-loader',
                include: /src/,
                exclude: /node_modules/,
                options: {
                    loaders: {
                    }
                }
            },
            {
                test: /\.tsx?$/,
                loader: 'ts-loader',
                include: /src/,
                exclude: /node_modules/,
                options: {
                    appendTsSuffixTo: [/\.vue$/],
                    transpileOnly: true,
                    compilerOptions: {
                        "noEmit": false
                    }
                }
            }
        ]
    },
    resolve: {
        symlinks: false,
        extensions: ['.ts', '.js', '.vue', '.json'],
        alias: {
            'vue$': 'vue/dist/vue.esm.js'
        }
    },
    performance: {
        hints: false
    },
    externals: [ /** external libraries**/ ]
});

Versions:
webpack 4.20.2
webpack-cli 3.1.2
typescript 3.1.1
ts-loader 5.2.2
fork-ts-checker-webpack-plugin 0.4.10

If you need more information, please let me know. Thanks in advance.

[charlesbetros]

Speed Measure Plugin seems to be causing this. Works fine without the 'smp.wrap' (for me).

[jrmccannon]

Removing the smp.wrap fixed the problem. Thanks! Closing the issue.