(lldb) r
There is a running process, kill it and restart?: [Y/n] y
Process 274301 exited with status = 9 (0x00000009) killed
Process 275040 launched: '/usr/local/google/home/blaikie/dev/carbon/a.out' (x86_64)
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1 2.1
    frame #0: 0x0000555555555831 a.out`main at base.carbon:26:3
   25   fn Run() {
-> 26     Core.Print(3);
   27     If(false, 3);
(lldb) n
3
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x0000555555555844 a.out`main at base.carbon:27:3
   26     Core.Print(3);
-> 27     If(false, 3);
   28     Core.Print(4);
(lldb) s
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step in
    frame #0: 0x00005555555557c4 a.out`If at base.carbon:12:3
   11   fn If(b: bool, limit: i32) {
-> 12     var counter: i32 = 0;
   13     if (b) {
(lldb) n
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x00005555555557cc a.out`If at base.carbon:13:6
   12     var counter: i32 = 0;
-> 13     if (b) {
   14       F();
(lldb)
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x0000555555555800 a.out`If at base.carbon:17:12
   16     } else {
-> 17       while (counter != limit) {
   18         Core.Print(2);
(lldb)
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x0000555555555810 a.out`If at base.carbon:18:7
   17       while (counter != limit) {
-> 18         Core.Print(2);
   19         G();
(lldb)
2
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x000055555555581f a.out`If at base.carbon:19:7
   18         Core.Print(2);
-> 19         G();
   20         counter = counter + 1;
(lldb) n
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x0000555555555824 a.out`If at base.carbon:20:7
   19         G();
-> 20         counter = counter + 1;
   21       }
(lldb)
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x0000555555555828 a.out`If at base.carbon:17:12
   16     } else {
-> 17       while (counter != limit) {
   18         Core.Print(2);
(lldb)
Process 275040 stopped
* thread #1, name = 'a.out', stop reason = step over
    frame #0: 0x0000555555555810 a.out`If at base.carbon:18:7
   17       while (counter != limit) {
-> 18         Core.Print(2);
   19         G();
(lldb)