htmlInlineProxyPlugin will broken with build watch and inline module script

[ZxBing0066]

Describe the bug

When we use vite build -w, with some inline module script, all build will crash when some file changed.

For reproduction:
Go to https://codesandbox.io/s/loving-satoshi-or8v6?file=/src/App.tsx , click server control panel => restart server.
Then open App.tsx and just change some code in the file, then some error log will print on the right bottom Terminal panel.

build started...
✓ 27 modules transformed.
[vite:html-inline-script-proxy] Could not load /sandbox/index.html?html-proxy&index=0.js (imported by index.html): Cannot read property '0' of undefined

Reproduction

https://codesandbox.io/s/loving-satoshi-or8v6?file=/src/App.tsx

System Info

System:
    OS: macOS 11.2.3
    CPU: (8) x64 Apple M1
    Memory: 148.04 MB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 12.22.1 - /Users/ZxBing0066/.nvm/versions/node/v12.22.1/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 6.14.12 - /Users/ZxBing0066/.nvm/versions/node/v12.22.1/bin/npm
  Browsers:
    Chrome: 96.0.4664.110
    Firefox: 95.0.2
    Safari: 14.0.3
  npmPackages:
    @vitejs/plugin-react: ^1.0.7 => 1.1.3 
    vite: ^2.7.2 => 2.7.9

Used Package Manager

yarn

Logs

[vite:html-inline-proxy] Could not load /Users/zxbing0066/Workspace/contribute/vite-demo/index.html?html-proxy&index=0.js (imported by index.html): Cannot read property '0' of undefined

Validations

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• Read the Contributing Guidelines.
• Read the docs.
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• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/vue-next instead.
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• The provided reproduction is a minimal reproducible example of the bug.