I've just updated Emacs sources in my local git clone and installed it in my laptop.

The attached file has all detail about steps that I use and also the backtrace.

I noticed that when Emacs is called via:

$ ~opt/emacs-repo/bin/emacs

Emacs crashes.

And when called via:

$ ~opt/emacs-repo/bin/emacs -Q

M-x load-file RET

~/.emacs RET

Emacs does not crash.