Does not work with Vue 2.5.18

Just create a new project with Vue CLI and you get a

35:1 Unable to resolve signature of class decorator when called as an expression.
  Type '<VC extends VueClass<Vue>>(target: VC) => VC' is missing the following properties from type 'typeof HelloWorld': exte
nd, nextTick, set, delete, and 7 more.
    33 | import { Component, Prop, Vue } from 'vue-property-decorator';
    34 |
  > 35 | @Component
       | ^
    36 | export default class HelloWorld extends Vue {
    37 |   @Prop() private msg!: string;
    38 | }

This happens since the update of Vue and vue-template-compiler to version 2.5.18. With 2.5.17 everything works.

[ktsn]

We already figured out the cause and a patch is already created https://github.com/vuejs/vue/pull/9173 Please wait until the next patch version of Vue is released, use Vue <= 2.5.17 or configure "strictFunctionTypes": false.

[blieque]

I seem to be getting this issue, but I’m not using the class component pattern. Is it likely to be related? I’ve tried pulling back vue and vue-template-compiler to 2.5.17, but I’m still getting this:

TS2322: Type 'VueConstructor<{ message: string; } & Vue>' is not assignable to type 'VueConstructor<Vue> | FunctionalComponentOptions<any, PropsDefinition<any>> | ComponentOptions<never, any, any, any, any, Record<string, any>> | AsyncComponent<any, any, any, any>'.

message is a prop of my component. The component is being included from another package, and both packages are in a Lerna monorepo. Components in the same directory work OK. I have a sfc.d.ts covering the webpack alias the component is imported under. This definition does have an effect, as the error message changes if the definition is removed and the component is imported but not used (if it is used the message is the same). By “used” I mean referenced in App.vue’s components{}.

I’ve no doubt this is the wrong place for this, but I’m at a bit of a loss. Sorry!

Edit: After looking again, this seems to be a separate error. Is there a better place to post this?