Using built-in generics in a generic type fails

[k4b7]

The following code:

type MyType<T> = Array<T>;

export type Props = {
  numbers: MyType<number>,
};

results in the following error:

TypeError: internalTypes[node.id.name] is not a function

      49 |   else if (node.type === 'GenericTypeAnnotation' && node.typeParameters) {
      50 |     const realTypeParameters = node.typeParameters.params.map(p => mapGenericToRealType(p, typeParamMapping));
    > 51 |     return internalTypes[node.id.name](realTypeParameters);
         |            ^
      52 |   }
      53 |   else if (node.type === 'ArrayTypeAnnotation') {
      54 |     const realElementType = mapGenericToRealType(node.elementType, typeParamMapping);

      at convertGenericToPropTypes (src/convertToPropTypes.js:51:12)
      ...

I put a break point there and discovered that "Array" is not a key of internalTypes and this is what was triggering the failure.