message: fix(compiler): handle negative length in codeframe repeat
diff: @@ -38,11 +38,13 @@ export function generateCodeFrame (
  function repeat (str, n) {
  let result = ''
  + if (n > 0) {
  while (true) { // eslint-disable-line
  if (n & 1) result += str
  n >>>= 1
  if (n <= 0) break
  str += str
  }
  + }
  return result
  }
  