What version of Go are you using (go version)?

$ go version
go version go1.21rc2 linux/amd64

Does this issue reproduce with the latest release?

Yes.

What did you do?

Look at the source code: https://cs.opensource.google/go/go/+/refs/tags/go1.21rc2:src/log/slog/logger.go;l=209-210

What did you expect to see?

This if must be executed before calling l.Enabled(ctx): https://cs.opensource.google/go/go/+/refs/tags/go1.21rc2:src/log/slog/logger.go;l=222-224

What did you see instead?

Current implementation violates current doc. https://pkg.go.dev/log/slog#Handler says:

	// If called from a Logger method, the first argument is the context
	// passed to that method, or context.Background() if nil was passed
	// or the method does not take a context.
...
	Enabled(context.Context, Level) bool