Pointer validation should set exit code to 1

$ root -l -b -q -e 'int*p=nullptr; *p' ; echo $?

...

Error in <HandleInterpreterException>: Trying to dereference null pointer or trying to call routine taking non-null arguments.

Execution of your code was aborted.

ROOT_cli_0:1:17: warning: null passed to a callee that requires a non-null argument [-Wnonnull]

int*p=nullptr; *p

                ^

0