TypeError: Cannot read property 'expval' of undefined

[xingorg1]

错误位置

common.expr = common.newNode.expval;

错误栈

TypeError: Cannot read property 'expval' of undefined
    at Compiler.parserExpr (binding.js? [sm]:730)
    at Function.parserExpr (binding.js? [sm]:740)
    at Binding.__bind (binding.js? [sm]:1421)
    at new Binding (binding.js? [sm]:1378)
    at Object.binding.eval (binding.js? [sm]:1563)
    at ge.press (index.js? [sm]:227)
    at Object.n.safeCallback (VM610 WAService.js:2)
    at VM610 WAService.js:2
    at a (VM610 WAService.js:2)
    at VM610 WAService.js:2(env: macOS,mp,1.05.2107090; lib: 2.14.1)