assigning string::c_str() to a const char* when the string goes out of scope

Question

I have a doubt on basic C++ usage. The code below, compiled with gcc/LInux, prints out correctly.

The string test goes out of scope so also its c_

Answer 1

It could be because of string pooling. Neverthless, it is Undefined behavior. We should not use the c_str() output once the string goes out of scope.