Bug Report

🔎 Search Terms

jsx extends ambiguity type parameters

🕗 Version & Regression Information

I only tested 4.5.4 and Nighty on the repl

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about "JSX and React"

⏯ Playground Link

Playground link with relevant code

💻 Code

// This works
<T implements U></T>;

// This doesn't
<T extends U></T>;

🙁 Actual behavior

The second JSX expression is parsed as a malformed arrow function

🙂 Expected behavior

Both are valid JSX elements