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@parcel/packager-html: Asset has no content

See original GitHub issue

🐛 bug report

After migrating from Parcel 1 (which had no errors),

parcel build ./html/prsm.html --public-url .

fails with Asset has no content error.

🎛 Configuration (.babelrc, package.json, cli command)

parcel build ./html/prsm.html --public-url .

no .parcelrc

./html/prsm.html has 667 lines of HTML, including links to js modules

🤔 Expected Behavior

Successful bundling, as with Parcel 1

😯 Current Behavior

Fails with

🚨 Build failed.
@parcel/packager-html: Asset has no content
Error: Asset has no content
    at CommittedAsset.getContent (/Users/scs1ng/Sites/prsm/node_modules/@parcel/core/lib/CommittedAsset.js:99:15)
    at CommittedAsset.getCode (/Users/scs1ng/Sites/prsm/node_modules/@parcel/core/lib/CommittedAsset.js:107:30)
    at Asset.getCode (/Users/scs1ng/Sites/prsm/node_modules/@parcel/core/lib/public/Asset.js:204:48)
    at /Users/scs1ng/Sites/prsm/node_modules/@parcel/packager-css/lib/CSSPackager.js:77:51
    at /Users/scs1ng/Sites/prsm/node_modules/@parcel/utils/lib/PromiseQueue.js:53:30
    at PromiseQueue._runFn (/Users/scs1ng/Sites/prsm/node_modules/@parcel/utils/lib/PromiseQueue.js:106:13)
    at PromiseQueue._next (/Users/scs1ng/Sites/prsm/node_modules/@parcel/utils/lib/PromiseQueue.js:93:16)
    at PromiseQueue.run (/Users/scs1ng/Sites/prsm/node_modules/@parcel/utils/lib/PromiseQueue.js:84:12)
    at Object.package (/Users/scs1ng/Sites/prsm/node_modules/@parcel/packager-css/lib/CSSPackager.js:86:31)
    at PackagerRunner.package (/Users/scs1ng/Sites/prsm/node_modules/@parcel/core/lib/PackagerRunner.js:346:27)

💁 Possible Solution

Don’t know

🔦 Context

💻 Code Sample

package.json (extract):

"scripts": {
		"lint": "./node_modules/.bin/eslint ./js/*.js --fix --quiet",
		"pretty": "prettier --write ./html/*.html ./*.html ./js/*.js ./css/prsm.css doc/**/*.{html,css} package.json",
		"dev": "parcel ./html/prsm.html",
		"build1": "parcel build ./html/prsm.html --public-url . ",
		"clean": "rm -rf dist/* out/*"
	},
	"dependencies": {
		"@egjs/hammerjs": "^2.0.17",
		"@joeattardi/emoji-button": "^2.12.1",
		"component-emitter": "^1.3.0",
		"fast-xml-parser": "^3.17.4",
		"foodoc": "0.0.9",
		"hammerjs": "^2.0.8",
		"keycharm": "^0.3.1",
		"moment": "^2.29.1",
		"timsort": "^0.3.0",
		"uuid": "^7.0.3",
		"vis-data": "^6.6.1",
		"vis-network": "^7.10.2",
		"vis-util": "^4.3.4",
		"y-indexeddb": "^9.0.5",
		"y-websocket": "^1.3.6",
		"yjs": "^13.4.2"
	},
	"devDependencies": {
		"eslint": "^6.8.0",
		"eslint-config-prettier": "^6.15.0",
		"jsdoc": "^3.6.6",
		"parcel": "^2.0.0-nightly.438",
		"prettier": "2.0.5"
	},