A segmentation fault occurs when a program tries to access an impermissible memory location. See
Wikipedia: Segmentation Fault
A segmentation fault can occur because of a bug/flaw in the design of the program's algorithm. A segmentation fault may also occur because of errors in user-supplied configuration/input.
The only way to avoid a segmentation fault is to correct the underlying source code of the program and/or verify that the program is given a valid input/configuration.
There is no one-size-fits-all solution to segmentation faults.
"why segmentation fault occurs"?
