Crash Bug: Using certain paths, ignoreGlobs may cause the Node process to crash.

[effectivecui]

For example, I run this code snippet using nodejs 16

const watcher = require('@parcel/watcher');
const path = require('path');

const watchPath = path.join(process.cwd(), 'hello')
const ignore = ['D:\\Users\\12234\\**']

// Subscribe to events
watcher.subscribe(watchPath, (err, events) => {
  console.log(events);
}, {
    ignore
});
process.on('uncaughtException', (e)=>{
    console.log('uncaughtException', e)
})

process.on('unhandledRejection', (e)=>{
    console.log('unhandledRejection', e)
})

Then, It will show me an unexpected result and crashed

Regex error: The expression contained an invalid escaped character, or a trailing escape.

Finally, I found the bug in src/binding.cc

Glob::Glob(std::string raw) {
  mRaw = raw;
  mHash = std::hash<std::string>()(raw);
  #ifndef __wasm32__
    mRegex = std::regex(raw);
  #endif
}

// something else


std::unordered_set<Glob> getIgnoreGlobs(Env env, Value opts) {
  std::unordered_set<Glob> result;

  if (opts.IsObject()) {
    Value v = opts.As<Object>().Get(String::New(env, "ignoreGlobs"));
    if (v.IsArray()) {
      Array items = v.As<Array>();
      for (size_t i = 0; i < items.Length(); i++) {
        Value item = items.Get(Number::New(env, i));
        if (item.IsString()) {
          auto key = item.As<String>().Utf8Value();

          // This line will throw regex error when key don't match the regex rule.
          result.emplace(key);

        }
      }
    }
  }

  return result;
}

Now, I try to solve this bug.

[effectivecui]

pr: #195