a.dll

void a(std::string& str){
  str="123;
}

test.exe

int main(){
  std::string str;
  a(str);
}

1. If a.dll and test.exe is Static CRT linked, and assume that std::string handle a char* point cstr to the buffer.Since the two modules compile std::string separately. Is it right that a.dll uses its own crt to alloc memory for cstr . Then test.exe uses its own crt to free memory for cstr.
2. If 1 is true. Can it guarantee that it is correct when a.dll and test.exe linked with same version of crt.

want to solve the doubt