- Electron version: 0.37.7
- Operating system: MacOS 10.11.4

Create a directory with the attached `package.json` and `main.js` files. The app just calls `app.makeSingleInstance` (code sample copied from the Electron docs) and then creates an empty window.

[package.json.txt](https://github.com/electron/electron/files/233556/package.json.txt)
[main.js.txt](https://github.com/electron/electron/files/233558/main.js.txt)

Type:

```
    rm -rf ~/Library/Application\ Support/Electron
    npm start
```

The app will display

```
    ### version 0.37.7
    ### shouldQuit:  true
```

...even though no other instance is running.

If you create an empty ~/Library/Application\ Support/Electron directory, the app runs as expected.

(Obviously, any established Electron developer will have such a directory and will not notice this bug. Their users will notice it very quickly indeed.)

chromium_src/chrome/browser/process_singleton_posix.cc
char* buf,
                       size_t bufsize,
                       const base::TimeDelta& timeout) {
  if (timeout > base::TimeDelta()) {
    int rv = WaitSocketForRead(fd, timeout);
    if (rv <= 0)
      return rv;
  }
  size_t bytes_read = 0;
  do {
    ssize_t rv = HANDLE_EINTR(read(fd, buf + bytes_read, bufsize - bytes_read));
    if (rv < 0) {
      if (errno != EAGAIN && errno != EWOULDBLOCK) {
        PLOG(ERROR) << "read() failed";
        return rv;
      } else {
        
        return bytes_read;
      }
    } else if (!rv) {
      
      return bytes_read;
    } else {
      bytes_read += rv;
    }
  } while (bytes_read < bufsize);
  return bytes_read;
}
void SetupSockAddr(const std::string& path, struct sockaddr_un* addr) {