...debugger support is currently rather anemic; in gdb, for example, many symbols are not recognized...

This stays broken after 1 year. How do we fix this?

GDB defines an interface called GDB MI. Also Mago supports this interface. Therefore you can...

...visual inspection.

You can dump memory with

  gdb -p $pid --eval-command 'dump binary memory...

...to one and `call gc_stats()` in gdb... and it segfaulted. Whoops.




I am willing...

...sigsegv running dustmite compiled with dmd ~master:
```
(gdb) r --force ../../druntime/src/ 'grep -nR HAVE...

...and makes it easy to
inspect on GDB. Maybe without it, dmd inlines it in...

...Thread 0x7ffff7aeb700 (LWP 5850)]
0x000000000045bed7 in _D4core6thread15scanAllTypeImplFNbMDFNbEQBmQBk8ScanTypePvQcZvQgZv ()
(gdb) bt
#0  0x000000000045bed7 in _D4core6thread15scanAllTypeImplFNbMDFNbEQBmQBk8ScanTypePvQcZvQgZv ()
#1  0x000000000045be7f...

...8.2.1-6.fc28.x86_64
(gdb)
(gdb) bt
#0  0x00000000005b6a01 in DsymbolSemanticVisitor::visit...

...fields.

(gdb) pt this
type = struct FRAME.D main {
    int [] a;
    int [] a;
} * const

(gdb...