shared_ptr-null.cc

‍example output:

y3c-stl terminated: undefined behavior detected (ub_access_nullptr)
  at y3c::shared_ptr<int>::operator*(): attempted to access the value of nullptr.
Stack trace (most recent call first):
#0 0x000000000000460b in main at /home/runner/work/y3c-stl/y3c-stl/build/../examples/shared_ptr-null.cc:5:13
       3: int main() {
       4:     y3c::shared_ptr<int> a = nullptr;
       5:     int v = *a;
       6: }
#1 0x0000000000029d8f at /lib/x86_64-linux-gnu/libc.so.6
#2 0x0000000000029e3f in __libc_start_main at /lib/x86_64-linux-gnu/libc.so.6
#3 0x0000000000004504 in _start at /home/runner/work/y3c-stl/y3c-stl/build/examples/y3c-example-shared_ptr-null

#include <y3c/memory>
 
int main() {
    y3c::shared_ptr<int> a = nullptr;
    int v = *a;
}