message: Include stdout and stderror on execChildProcess errors.
diff: @@ -71,7 +71,9 @@ export async function execChildProcess(command: string, workingDirectory: string
  return new Promise<string>((resolve, reject) => {
  cp.exec(command, { cwd: workingDirectory, maxBuffer: 500 * 1024 }, (error, stdout, stderr) => {
  if (error) {
  - reject(error);
  + reject(`${error}
  +${stdout}
  +${stderr}`);
  }
  else if (stderr && !stderr.includes("screen size is bogus")) {
  reject(new Error(stderr));
  