copy constructor error 01

Output when using
tailPtr = newPtr->next;
// ------------------------------------------//

START OF TEST 4:
Testing the copy constructor (2 points).
Copy constructor test: for an empty Sequence.
Testing that size() returns 0 ... Passed.
Testing that is_item() returns false ... Passed.
I'll call start() and look at the items one more time...
All tests passed for this Sequence.

Copy constructor test: for a Sequence with cursor at tail.
tail assigned
Testing that size() returns 20 ... Passed.
Testing that is_item() returns true ... Passed.
The cursor should be at item [19] of the Sequence
(counting the first item as [0]). I will advance the cursor
to the end of the Sequence, checking that each item is correct...Passed.
I'll call start() and look at the items one more time...
The cursor should be at item [0] of the Sequence
(counting the first item as [0]). I will advance the cursor
to the end of the Sequence, checking that each item is correct...Passed.
All tests passed for this Sequence.

Copy constructor test: with cursor near middle.
// infinitely looping here





Output when using
tailPtr = newPtr;
// ------------------------------------------//
START OF TEST 4:
Testing the copy constructor (2 points).
Copy constructor test: for an empty Sequence.
Testing that size() returns 0 ... Passed.
Testing that is_item() returns false ... Passed.
I'll call start() and look at the items one more time...
All tests passed for this Sequence.

Copy constructor test: for a Sequence with cursor at tail.
tail assigned
Testing that size() returns 20 ... Passed.
Testing that is_item() returns true ... Passed.
The cursor should be at item [19] of the Sequence
(counting the first item as [0]). I will advance the cursor
to the end of the Sequence, checking that each item is correct...Passed.
I'll call start() and look at the items one more time...
The cursor should be at item [0] of the Sequence
(counting the first item as [0]). I will advance the cursor
to the end of the Sequence, checking that each item is correct...Passed.
All tests passed for this Sequence.

Copy constructor test: with cursor near middle.
Segmentation fault: 11