`Error: Attempting to use a disconnected port object`

[gorhill]

Repro steps:

• Go to "3rd-party filters"
• Force a reload of filter lists (however you wish)
• Quickly change dashboard tab before the reload of the filter lists complete

Error message in console of extension:

Error in response to storage.get: Error: Attempting to use a disconnected port object
    at callback (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/vapi-background.js:253:18)
    at onMetadataReady (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/messaging.js:483:9)
    at checkCacheObsolescence (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:934:9)
    at onRepoMetaReady (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:954:9)
    at µBlock.assets.getRepoMetadata (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:287:13)
    at onCacheMetaReady (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:977:9)
    at Object.µBlock.assets.getEntries [as entries] (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:96:13)
    at onBuiltinListsLoaded (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/storage.js:223:22)
    at reportBack (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:663:9)
    at XMLHttpRequest.onInstallFileLoaded (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:669:9)
    at XMLHttpRequest.onResponseReceived (chrome-extension://lgbmdnkabkjpmegohhnoabimkbfapigk/js/assets.js:240:27)

Maybe adding a disconnected property on the port object could work, this way the closure approach could still be used.

I suppose using a slower computer help makes this problem more easy to reproduce.