chromium/chrome/test/data/extensions/bad/Extensions/hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh/manifest.json

{
  "name": "My extension with a zero-length page action icon",
  "version": "1.0",
  "page_action": {
    "default_icon": "icon.png"
  },
  "manifest_version": 2
}