showToast无法正常显示。会显示一个小框。

如果插件内使用，会报（开发工具内不再现，需要在pc微信内预览，或线上）

MiniProgramError

Cannot read property 'plugins' of undefined

TypeError: Cannot read property 'plugins' of undefined

at Function.success (<anonymous>:2:2751012)

at u (<anonymous>:2:114071)

at Object.success (<anonymous>:2:114523)

at <anonymous>:2:1910350

at Generator.next (<anonymous>)

at r (<anonymous>:2:1032)

at s (<anonymous>:2:1235)

错误

代码，直接调用即可，开发工具 sdk版本选择2.19.2