Cannot use an alias as an input

[matthewp]

• Rollup Plugin Name: @rollup/plugin-alias
• Rollup Plugin Version: 3.1.9
• Rollup Version: 2.74.0
• Operating System (or Browser): OSX
• Node Version: 16
• Link to reproduction (⚠️ read below): https://replit.com/@matthewp17/rollup-plugin-alias-bug

Expected Behavior

You should be able to pass an alias as an input.

Actual Behavior

An error for not being able to resolve the alias is shown in the console.

Additional Information

This is the code that causes the bug:

plugins/packages/alias/src/index.ts

Lines 79 to 81 in 36de7cc

	if (!importer) {
	return null;
	}

Was introduced in this PR: #1024

Doesn't seem like the PR was intentionally trying to make an alias as an input not be allowed, so I think this part was a mistake.

[stale]

Hey folks. This issue hasn't received any traction for 60 days, so we're going to close this for housekeeping. If this is still an ongoing issue, please do consider contributing a Pull Request to resolve it. Further discussion is always welcome even with the issue closed. If anything actionable is posted in the comments, we'll consider reopening it. ⓘ