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Iterating over a map and calling a function that removes other elements is a map

I have a map that is defined in global memory. I repeat this, let's say I'm in the third element. now I call another function that generates its own iterator on the same map, however it can erase the 4th or 5th ... elements on the map. my question is when I return from this function and continue to iterate over the map (let me remind you that I am in the third element), can my iterator be invalid or safe?

Sorry, I can’t attach the code for very long.

thank

EDIT: my question is something like this:

map<string,string> mapi;

void er() {
    mapi.erase("t");
} 

int main() {


mapi.insert(pair<string,string>("w","a"));
mapi.insert(pair<string,string>("e","a"));
mapi.insert(pair<string,string>("r","a"));
mapi.insert(pair<string,string>("t","a"));
mapi.insert(pair<string,string>("A","a"));
mapi.insert(pair<string,string>("u","a"));
mapi.insert(pair<string,string>("C","a"));

map<string,string>::iterator it;
for (it=mapi.begin(); it!=mapi.end(); it++) {
    cout << it->first << endl;
    if (it->first=="t")
        er();
}

}

in this case, I erase the same element - valgrind says an error. however, when I delete other elements, it seems to work fine.

+5

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