Bus Route DLL

...Reading the input file ...
...Info of the route:
The list of bus stops for Route No. 11:
Stop 1:Diamond Hill MTR Station, 0, 114.202
Stop 2:Choi Hung MTR Station, 0, 114.209
Stop 3:UST North, 0, 114.265

...The direct distance of the route is 0.0637665
...The path length of the route is 0.0637665

...Searching for the stop "UST North"...
...The stop is found.
...The next stop is:
...The prev stop is: Choi Hung MTR Station

...Inserting the stop "UST South":
...Info of the updated route:
The list of bus stops for Route No. 11:
Stop 1:Diamond Hill MTR Station, 0, 114.202
Stop 2:Choi Hung MTR Station, 0, 114.209
Stop 3:UST South, 22.3375, 114.263
Stop 4:UST North, 0, 114.265

...Removing the stop "UST South":
...Info of the updated route:
The list of bus stops for Route No. 11:
Stop 1:Diamond Hill MTR Station, 0, 114.202
Stop 2:Choi Hung MTR Station, 0, 114.209
Stop 3:UST North, 0, 114.265

...Reversing the route:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000402800 in reverseList (route=..., stopA=..., stopB=...)
    at busRoute.cpp:316
316	          nonReverseEnd->prev = head;