Bug leads to crash program when using .set<T>() and then apply_visitor()

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#include
#include
#include
using namespace std;
using namespace mapbox::util;

// Forward declaration
struct HPArray;
struct HPTable;
using HPVariant = variant>;

struct HPArray{
template
HPArray(Args ...args){
values.emplace(std::forward(args)...);
}
unordered_map values;
};

struct Visitor{

void operator()(const string &str){
cout << str <(ar);
Visitor visitor;
apply_visitor(visitor,var);
return 0;
}

Compile and run the C++ reproducer from the issue, then inspect the implementations of set() and apply_visitor(). Done means the example completes without crashing and the visitor handles the stored string and float values.

Written by the indexing model from the issue text.