C++
clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git 1c19900f9417bd0b832c1cb70863b2439a18647f)
$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=gnu++2a prog.cc:7:14: warning: object backing the pointer will be destroyed at the end of the full-expression [-Wdangling-gsl]
auto p = std::to_string(0).c_str();
^~~~~~~~~~~~~~~~~
prog.cc:8:12: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
printf(p);
^
prog.cc:8:12: note: treat the string as an argument to avoid this
printf(p);
^
"%s",
2 warnings generated.
0