Unable to recover from loss-of-target without `abort()`

[Sean Cross]

It is not possible to recover from the loss of a target.

When a target is lost, an exception is raised. The target list is then freed:

blackmagic/src/main.c

Lines 87 to 92 in e4da644

 if (e.type) { 
 	gdb_putpacketz("EFF"); 
 	target_list_free(); 
 	gdb_outf("Uncaught exception: %s\n", e.msg); 
 	morse("TARGET LOST.", true); 
 } 

The problem comes from the fact that target_list_free() is not contained within a try {} block. If there is still a target attached it will attempt to do various things such as resetting breakpoints on the target which no longer exists which will raise another exception and cause a reboot.