[Issue 23945] ICE caused by std.sumtype

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23945

FeepingCreature <default_357-line at yahoo.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |default_357-line at yahoo.de

--- Comment #1 from FeepingCreature <default_357-line at yahoo.de> ---
Maybe reduction:

struct SumType()
{    
    ArrayValue value;

    this(ArrayValue value)
    {
        this.value = value;
    }

    static if (__traits(compiles, hashOf(ElementValuePair.init)))
    {
            size_t toHash() { return 0; }
    }
}

struct ArrayValue
{
    ElementValue[] values;
}

struct ElementValuePair
{
    ElementValue element_value;
}

alias ElementValue = SumType!();

====

Error: unknown, please file report on issues.dlang.org

I suspect something with hashOf and struct initialization order. I think this
may have been a few steps minified too far, but it's still spitting out "Error:
unknown", so...

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