Parser hangs on comment ending with `-*/`

[core-dumpling]

🔎 Search Terms

infinite loop, hyphen, comment, JSDoc

🕗 Version & Regression Information

• This changed between versions 5.4.5 and 5.5.2.
• This likely changed in commit cd566bad95124aded20f4cd35e95810077500e40.

⏯ Playground Link

No response

💻 Code

import ts from 'typescript';

ts.createSourceFile(
  "t.ts",
  "/**a-*/\nconst x = 1;",
  ts.ScriptTarget.ESNext,
  true,
);

🙁 Actual behavior

createSourceFile never returns. The process spins until killed.

🙂 Expected behavior

The parser should finish normally.

Additional information about the issue

I think this comes from the scanner used for comments that start with /**, even when the comment does not contain any JSDoc tags.
In editors that use the TypeScript language server, this can also leave the project stuck during initialization if one of the files contains this comment.

[RyanCavanaugh]

Doesn't repro in tsgo but a total LS hang is quite bad; we might want to take this for a 6.0 patch