Sjsonnet does not reject invalid arguments being passed to a function

[lihaoyi-databricks]

The following snippet fails with google/jsonnet, passes with sjsonnet:

lihaoyi ~$ cat foo.jsonnet
// A function that returns an object.
local Person(name='Alice') = {
  name: name,
  welcome: 'Hello ' + name + '!',
};
{
  person2: Person('Bob', hello=123),
}
lihaoyi ~$ ./sjsonnet.jar foo.jsonnet
{
   "person2": {
      "name": "Bob",
      "welcome": "Hello Bob!"
   }
}