C++ Qt memory allocation exception with QList -

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How could it be that it throws an exception 

 for  (int H = 0; H & lt; listOnecount (); ++ H) {Delete] [List] A [H]; }   
 One with the QList list? I repeat float * ARAT until I reach the number of elements in the QList ...  
  Edit & amp; Solution   
 In fact, it fails when I am only adding a float to an item in QList, then it is no other  float *  and You can not delete  []   
 
 
  How could this be a Exceptions thrown   
 One posibility: You added an array 2 time to the list. One fix:  
 for  (int h = 0; h & lt; list on count (); ++ h) {delete] [list] [h]; ListOne [hr] = nullptr; }   
 Perhaps other errors (you are not in the list-add array points). Edit:  
 
 In fact, it fails when I'm only adding a float to an item in QList. Again, this is not a float * and you can not delete it [].   
 I doubt ... a very simple fix:  
  float * p = new float [1]; Exemplary [0] = 3.14f;   
 Now add  pi  to the list

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