Generate a traceback upon error
Integer_Type _traceback
_traceback is an intrinsic integer variable whose value
controls whether or not a traceback of the call stack is to be
generated upon error. If _traceback is greater than zero, a
full traceback will be generated, which includes the values of local
variables. If the value is less than zero, a traceback will be
generated without local variable information, and if
_traceback is zero the traceback will not be generated.
Local variables are represented in the form $n where n is an
integer numbered from zero. More explicitly, $0 represents the
first local variable, $1 represents the second, and so on.
Please note that function parameters are local variables and that the
first parameter corresponds to $0.
_slangtrace, error