Valgrind：无效读取大小4 - > sigsegv，没有valgrind和视觉工作室工作正常

I have implemented a compression algorithm (using huffman coding) which uses a priority queue of nodes (a struct i defined). Now, when i just run the code in linux or in visual studio, everything works fine. When I check for memory leaks in visual studio, none are given. I have implemented a compression algorithm (usi