Invalid count value

[mfikes]

Type four open brackets, and then return, and a close, and return and a close.
Fails on master.

cljs.user=> [[[[
       #_=>     ]
       #_=> ]
       #_=> readline.js:990
            throw err;
            ^

RangeError: Invalid count value
    at String.repeat (native)
    at v ([eval]:2:22016)
    at Interface.<anonymous> ([eval]:2:24076)
    at emitOne (events.js:96:13)
    at Interface.emit (events.js:191:7)
    at Interface._onLine (readline.js:241:10)
    at Interface._line (readline.js:590:8)
    at Interface._ttyWrite (readline.js:869:14)
    at Interface.write (readline.js:352:24)
    at ReadStream.<anonymous> ([eval]:2:22905)