[Issue 3821] writeln doesn't detect recursive data structures yet

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=3821

--- Comment #5 from bearophile_hugs at eml.cc ---
(In reply to Andrej Mitrovic from comment #1)
> Got a newer example maybe? std.boxer is long gone.

Is this good enough?


void main() {
    import std.stdio, std.variant;
    auto a = new Variant[1];
    a[0] = a;
    writeln(a); // Error: Stack Overflow
}

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