(a)
(gdb) tbreak foobar.c:422
Breakpoint 3 at 0x80492b0: file foobar.c, line 422.
(gdb) info breakpoints
 ...
(gdb) jump foobar.c:422
Line 422 is not in `list_test(int)'. Jump anyway? (y or n)

(b)
Line 422 is not in `list_test(int)'. Jump anyway? (y or n) no
Not confirmed.
(gdb) delete 3
(gdb) info breakpoints
 ...
(gdb) _

Example 2: (a) Do we really want to move the execution position? (b) No, we don't want to move it.