Parser throws undefined when parsing HTML-Like comment

[fisker]

Bug Report

• I would like to work on a fix!

Properly not

Current behavior

When parsing HTML-Like comment with sourceType: 'module', the @babel/parser throws undefined.

Input Code

require('@babel/parser').parse('alert(<!--comment\n)', {plugins: ['jsx'], sourceType: 'module'})

Expected behavior

Should throw an error.

Babel Configuration (babel.config.js, .babelrc, package.json#babel, cli command, .eslintrc)

NaN

Environment

- Babel version(s): 7.10.4
- Node/npm version: [e.g. Node v14.4.0/npm v6.14.5]
- OS: Windows 10
- Monorepo: no
- How you are using Babel: api

Possible Solution

NaN

Additional context

PR on Prettier project prettier/prettier#8688

CI Log https://github.com/prettier/prettier/runs/825234580?check_suite_focus=true#step:7:1200

Expected error, Received: undefined

[babel-bot]

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[fisker]

Maybe caused by #11722?

[fisker]

Local tested changing

https://github.com/babel/babel/pull/11722/files#diff-56fea09eea2de51b8291db400d2f69beR1175

to

-          throw this.expectOnePlugin(["jsx", "flow", "typescript"]);
+          this.expectOnePlugin(["jsx", "flow", "typescript"]);

Fixes this issue, but I think it's not right, if it's HTML-Like comment, it should not expect those plugins, and those plugins wouldn't help.

Maybe we need check sourceType there.

I'm not familiar with codebase, I'm not going to send PR.

[JLHwung]

@fisker Thanks for the detailed report and background digging. It helps a lot.