Re: Help please! To track down GC trying to free an already freed object.

[Eli Zaretskii]

> Date: Tue, 2 Apr 2019 20:46:53 +0000
> From: Alan Mackenzie <address@hidden>
> Cc: Daniel Colascione <address@hidden>, address@hidden
> 
> > GDB supports reverse execution as well, on some platforms.
> 
> On my GNU/Linux system, I tried to run 'reverse-next', and got the error
> message:
> 
>     Target multi-thread does not support this command.

I think you are supposed to record the execution, and then say

  (gdb) target record-core

or

  (gdb) target record-btrace

before the reverse execution is available.

But I was always able to debug GC problems by using last_marked array.