Why do I have std::list element declaration errors?

I am writing a program in c++ (for a list) where an element that is smaller than the one before is deleted. I declared 2 elements- current and next but i get declaration errors and have no idea why. I checked the syntax, it is correct.

My code:

#include <iostream>
#include <list>
using namespace std;

void deleteFromSTLList(list<int> &numbers) {
    auto curr = numbers.begin();
    auto next = ++numbers.begin();
    while (next != numbers.end()) {
        if (*curr < *next) {
            next = numbers.erase(next);
            continue;
        }
        curr = next;
        next++;
    }
}

I am getting an error that my variables curr and next ar not declared in this scope and do not name a type.