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Examples of errors detected by the V106…

Examples of errors detected by the V1062 diagnostic

V1062. Class defines a custom new or delete operator. The opposite operator must also be defined.


DeepSpeech

V1062 The 'DfsState' class defines a custom 'new' operator. The 'delete' operator must also be defined. dfs-visit.h 62


void* MemoryPool<DfsState<FST>>::Allocate() {
  if (free_list_ == nullptr) {
    auto *link = static_cast<Link *>(mem_arena_.Allocate(1));
    link->next = nullptr;
    return link;
  } else {
    auto *link = free_list_;
    free_list_ = link->next;
    return link;
  }
}

void MemoryPool<DfsState<FST>>::Free(void *ptr) {
  if (ptr) {
    auto *link = static_cast<Link *>(ptr);
    link->next = free_list_;
    free_list_ = link;
  }
}

// An FST state's DFS stack state.
template <class FST>
struct DfsState {
public:
  ....
  void *operator new(size_t size,
                     MemoryPool<DfsState<FST>> *pool) {
    return pool->Allocate();
  }
  ....
}

A programmer defined the custom 'new' operator, which adds an element to the linked list using the 'Allocate()' function, but forgot to add a custom 'delete', which should use the 'Free()' function.

Similar errors can be found in some other places:

  • V1062 The 'VectorState' class defines a custom 'new' operator. The 'delete' operator must also be defined. vector-fst.h 31
  • V1062 The 'CacheState' class defines a custom 'new' operator. The 'delete' operator must also be defined. cache.h 65