public void testJIRA161() {
    Serializable s = MVEL.compileExpression("1==-(-1)", ParserContext.create().stronglyTyped());
    assertEquals(1 == -(-1), MVEL.executeExpression(s));

    ParserContext ctx = new ParserContext();
    ctx.setStrongTyping(true);
    CompiledExpression compiledExpression = new ExpressionCompiler("1==-(-1)", ctx).compile();
    assertEquals(1 == -(-1), MVEL.executeExpression(compiledExpression));
  }