A “std::bad_alloc” issue caused by typo

Last week, I fixed a bug which was caused by a typo. The simplified code is like this:

#include <vector>
using namespace std;

class A {
    int i;
public:
    A(int i): i(i) {}
};

class B {
    vector<A> v;
public:
    B(vector<A> v1): v(v) {}
};

int main() {
    vector<A> a(1, 0);
    B b(a);
    return 0;
}

Please note the constructor of B:

B(vector<A> v1): v(v) {}

It was supposed to use v1 to initialize v, while I misspelled: v(v). My compiler is gcc 6.3.1, compile and run it:

# g++ -g test.cpp
# ./a.out
terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Aborted (core dumped)

Change B(vector<A> v1): v(v) to B(vector<A> v1): v(v1), then all is OK.