(gdb) n
10              var parity int64 = -1 // prevent the first iteration from matching
(gdb)
11              counts := map[int]int{0: -1}
(gdb)
panic: runtime error: index out of range

goroutine 4 [running]:
math/rand.(*rngSource).Int63(0xf840040800, 0x512b9e5555d1014b, 0xd32900000000, 0xd328)
        /home/sad/go/src/pkg/math/rand/rng.go:243 +0x5a
main.SurvivalParity(0xf840032030, 0xf840040800, 0x547778, 0x0, 0x0, ...)
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/parity-test.go:15 +0xd5
main.doTest(0xf840032030, 0xf840040800, 0x40183e, 0x7fffffffe8c7, 0xf800000005, ...)
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:90 +0x6d
created by main.main
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:81 +0x562

goroutine 1 [semacquire]:
sync.runtime_Semacquire(0xf84004c040, 0xf84004c040)
        /home/sad/go/src/pkg/runtime/zsema_amd64.c:146 +0x25
sync.(*WaitGroup).Wait(0x5476a0, 0xf840040800)
        /home/sad/go/src/pkg/sync/waitgroup.go:78 +0xf2
main.main()
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:84 +0x5a1

goroutine 2 [syscall]:
created by runtime.main
        /home/sad/go/src/pkg/runtime/proc.c:221

goroutine 3 [running]:
created by main.main
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:81 +0x562

goroutine 5 [running]:
created by main.main
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:81 +0x562
panic: runtime error: index out of range

goroutine 5 [running]:
math/rand.(*rngSource).Int63(0xf840040800, 0xf840031d20, 0x75500000005, 0x754)
        /home/sad/go/src/pkg/math/rand/rng.go:243 +0x5a
main.Survival(0xf840032030, 0xf840040800, 0x547778, 0x0, 0x0, ...)
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/survival-test.go:16 +0xa9
main.doTest(0xf840032030, 0xf840040800, 0x4020b3, 0x7fffffffe8c7, 0xf800000005, ...)
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:90 +0x6d
created by main.main
        /home/sad/gocode/src/github.com/zephyrtronium/prngt/main.go:81 +0x562
[LWP 22372 exited]
[LWP 22369 exited]
[Inferior 1 (process 22369) exited with code 02]