Bug 13635 – implicit class constructor should instantiate templated base class constructor

cat > bug.d << CODE class Base { this(this Derived)() {} } class Foo : Base { // this() { super(); } // explicit constructor needed } CODE dmd -c bug ---- bug.d(6): Error: class bug.Foo Cannot implicitly generate a default ctor when base class bug.Base is missing a default ctor ---- The default constructor code should try to call the super class constructor without arguments instead of detecting a `this()` function.

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