A bus ERROR indicates an attempt to access memory in an illegal way,perhaps due to an unaligned pointer. 

A ‘bus error’ is certain UNDEFINED behavior result type. The cause for such error on a system could not be specified by the C language. The memory accessibility which CPU could not address physically, ‘bus error’ occurs. Also, any fault detected by a device by the computer system can also be a ‘bus error’. These errors caused by PROGRAMS that GENERATE undefined behavior which C language no longer SPECIFIES what can happen.

A bus error indicates an attempt to access memory in an illegal way,perhaps due to an unaligned pointer. 

A ‘bus error’ is certain undefined behavior result type. The cause for such error on a system could not be specified by the C language. The memory accessibility which CPU could not address physically, ‘bus error’ occurs. Also, any fault detected by a device by the computer system can also be a ‘bus error’. These errors caused by programs that generate undefined behavior which C language no longer specifies what can happen.