bug#39962: 27.0.90; Crash in Emacs 27.0.90

[Robert Pluim]

>>>>> On Wed, 18 Mar 2020 06:17:01 +0000, Pip Cet <pipcet@gmail.com> said:

    Pip> On Tue, Mar 17, 2020 at 8:59 PM Paul Eggert <eggert@cs.ucla.edu> wrote:
    >> Although I haven't been following this in detail, I'd like to suggest 
trying a
    >> GDB watchpoint to find the bug. Watchpoints have been invaluable to me 
when I
    >> debug garbage-collector and other memory management issues.

    Pip> They are! Unfortunately, they require a predictable address at which
    Pip> the corruption happens, and we don't appear to have that.

You have a known address if you use rr and run in reverse.

Robert