ASan may detect other memory problems for instance memory leaks: How to define memory leak in a C++ code/venture? df.columns = new in which new is definitely the list of new columns names is as simple as it gets. The disadvantage of this technique is always that it needs modifying https://stack-ball-arcade-game20692.blogrelation.com/42870515/the-best-side-of-best-stack-ball-free-game