kern/57571: ddb should not say 'fatal breakpoint trap' when entered non-fatally

[campbell+netbsd%mumble.net@localhost]

>Number:         57571
>Category:       kern
>Synopsis:       ddb should not say 'fatal breakpoint trap' when entered non-fatally
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 07 19:05:00 +0000 2023
>Originator:     Taylor R Campbell
>Release:        current
>Organization:
The NetBSfatal breakpoint trap in gnats mode
>Environment:
>Description:
Entering ddb with cnmagic or any other way that is safely continuable (barring shenanigans you do while at the ddb prompt) should not print 'fatal breakpoint trap' when it is not, in fact, fatal.
>How-To-Repeat:
1. Run `sysctl -w hw.cnmagic=+++++'.
2. Type `+++++' at the console.
3. Do `c' at the ddb prompt and see that the system recovers just fine.
>Fix:
Yes, please!