import std.string;
import std.traits;
import std.typetuple;

void main()
{
    if (allSatisfy!(isNumeric, int, short))
    {
    }
}

D:\DMD\dmd2\windows\bin\..\..\src\phobos\std\typetuple.d(576): Error: template instance F is not a template declaration, it is a overloadset

This took a good while to figure out what went wrong. std.traits defines isNumeric, but std.string defines it too. allSatisfy takes an alias type parameter with no constraints, so maybe some constraints could be added so it doesn't get instantiated with regular functions but only template functions?