Lose breakpoint after restart

[awmorgan]

If I set a breakpoint and then restart the process sometimes the breakpoint changes to address 0 which effectively disables the breakpoint. How do I prevent losing breakpoints after a restart?

For example here you can see that breakpoint 2 changed from a valid address to 0 on restart. Breakpoint 1 did not change so it is still valid after the restart:

/Volumes/git/x $ cat main.go
package main

func main() {
        println("Hello, world!")
}
/Volumes/git/x $ dlv debug .
Type 'help' for list of commands.
(dlv) b main.main
Breakpoint 1 set at 0x105fb66 for main.main() ./main.go:3
(dlv) c
> main.main() ./main.go:3 (hits goroutine(1):1 total:1) (PC: 0x105fb66)
     1: package main
     2:
=>   3: func main() {
     4:         println("Hello, world!")
     5: }
(dlv) b 4
Breakpoint 2 set at 0x105fb74 for main.main() ./main.go:4
(dlv) c
> main.main() ./main.go:4 (hits goroutine(1):1 total:1) (PC: 0x105fb74)
     1: package main
     2:
     3: func main() {
=>   4:         println("Hello, world!")
     5: }
(dlv) bp
Breakpoint runtime-fatal-throw (enabled) at 0x1031aa0,0x1031ba0 for (multiple functions)() <multiple locations>:0 (0)
Breakpoint unrecovered-panic (enabled) at 0x1031f40 for runtime.fatalpanic() /usr/local/go/src/runtime/panic.go:1145 (0)
        print runtime.curg._panic.arg
Breakpoint 1 (enabled) at 0x105fb66 for main.main() ./main.go:3 (1)
Breakpoint 2 (enabled) at 0x105fb74 for main.main() ./main.go:4 (1)
(dlv) r
Process restarted with PID 24326
(dlv) c
> main.main() ./main.go:3 (hits goroutine(1):1 total:1) (PC: 0x105fb66)
     1: package main
     2:
=>   3: func main() {
     4:         println("Hello, world!")
     5: }
(dlv) bp
Breakpoint runtime-fatal-throw (enabled) at 0x1031aa0,0x1031ba0 for (multiple functions)() <multiple locations>:0 (0)
Breakpoint unrecovered-panic (enabled) at 0x1031f40 for runtime.fatalpanic() /usr/local/go/src/runtime/panic.go:1145 (0)
        print runtime.curg._panic.arg
Breakpoint 1 (enabled) at 0x105fb66 for main.main() ./main.go:3 (1)
Breakpoint 2 (enabled) at 0x0 for main.main() ./main.go:4 (0)
(dlv) c
Hello, world!
Process 24326 has exited with status 0
(dlv)