multiple_redirecting_constructor_invocations

Constructors can have only one 'this' redirection, at most.

The analyzer produces this diagnostic when a constructor redirects to more than one other constructor in the same class (using this).

The following code produces this diagnostic because the unnamed constructor in C is redirecting to both this.a and this.b:

class C {
  C() : this.a(), this.b();
  C.a();
  C.b();
}

Remove all but one of the redirections:

class C {
  C() : this.a();
  C.a();
  C.b();
}

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