build error using .vuepress/components with scripts

[genedronek]

Bug report

Version

most current vuepress 0.9.0

Steps to reproduce

git  from https://github.com/genedronek/vuepress-bug.git
cd vuepress-bug
vuepress build docs

What is expected?

"vuepress build docs" should work

What is actually happening?

build blows up; bad default object, and other manifestations

Other relevant information

any .vuepress/component with script will cause failure

• Your OS: Mac Sierra
• Node.js version: v10.2
• Browser version: n.a.
• Is this a global or local install?
  global, but either kind, local or global, vuepress build will fail.
• Which package manager did you use for the install?
  npm install -g vuepress;
  I performed complete reload of node and npm.
  Could not believe my eyes. Perhaps I had made a newbie blunder. Not likely.
  This is my third day of reducing this bug for reporting. There are other vpress
  bug reports regarding build problems.

I say it again. You guys are doing bang up wonderful work on a wonderfully complex package.
It must be very hard. But we love you for it.

[genedronek]

I am just now finding a case where .vuepress/components script is working.
sigh. I will resubmit when I find out wtf.

[chrtz]

I think it could be possible this has to do with the new npm (6.10) and the audit function. As there are two vulnerabilities according to string.js.

(#493)