Unparseable characters not rendered or detected

[metaperl]

Per this reddit discussion we see that the following code will cause the Clojure compiler to throw an error:

 (defn r->lfix 
  ([a op b] (op a b))
  ([a op1 b op2 c] (op1 a (op2 b c)))
  ([a op1 b op2 c op3 d] (op1 a (op2 b (op3 c d))))�)

However:

1. the unparseable character is not rendered when this code is pasted into Nightcode
2. Nightcode does not flag the line as syntactically invalid

The error is only caught when one attempts to compile the code.

[oakes]

I'll take a look at this, thank you for pointing it out.