$ telnet localhost 3333
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Welcome to the Pike Debugger.
> object bp = Debug.Debugger.add_breakpoint("/path/to/file.pike", 22);
> object bp1 = Debug.Debugger.add_breakpoint("/path/to/file.pike", "/path/to/included_file.h", 2);
> bp->enable();
> bp1->enable();
> go
Breakpoint on /Users/hww3/bpt.pike:22
> backtrace;
(1) Result: ({ /* 4 elements */
                backtrace_frame(/Users/hww3/pike2/build/darwin-16.7.0-x86_64/master.pike:4148, _main(), Args: 1),
                backtrace_frame(-:1, `()(), Args: 1),
                backtrace_frame(/Users/hww3/bpt.pike:14, doit(), No args),
                backtrace_frame(/Users/hww3/bpt.h:2, whee(), Args: 1)
            })
> backtrace[-1]->locals();
(4) Result: ({ /* 3 elements */
                "rad",
                0,
                0
            })
> backtrace[-1]->set_local(1, "bar");
(5) Result: 0
> backtrace[-1]->locals();
(6) Result: ({ /* 3 elements */
                "rad",
                "bar",
                0
            })
> step
Stepping.
Breakpoint on /Users/hww3/bpt.h:2
> go