sisc -e "(+ 1 2)" doesn't seem to work

Hello,

how is the -e (--eval) command line argument supposed
to be used? sisc -e 1 works as expected (prints result
1 and continues to REPL). sisc -e "(+ 2 1)" gives the
following stack trace in 1.15.2:

Exception in thread "main" java.io.IOException:
unexpected end-of-file.
        at sisc.reader.Parser.potentialError(Unknown
Source)
        at sisc.reader.Parser.readList(Unknown Source)
        at sisc.reader.Parser._nextExpression(Unknown
Source)
        at sisc.reader.Parser.nextExpression(Unknown
Source)
        at sisc.reader.Parser.nextExpression(Unknown
Source)
        at sisc.reader.Parser.nextExpression(Unknown
Source)
        at
sisc.interpreter.Interpreter.evalInput(Unknown Source)
        at sisc.interpreter.Interpreter.eval(Unknown
Source)
        at sisc.REPL.main(Unknown Source)


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