bug#35409: 27.0.50; Emacs master can't be built in Win 10

[Eli Zaretskii]

> From: Shuguang Sun <shuguang79@qq.com>
> Date: Wed, 24 Apr 2019 13:55:42 +0800
> Feedback-ID: esmtp:qq.com:bgforeign:bgforeign4
> 
> I tried to build emacs master from 22 April till
> 5f4e8e2e088de9fb76cb631077c6eddd3219f594. 
> It fails with following message:
> 
> --8<---------------cut here---------------start------------->8---
> Loading c:/gitemacs/emacs/lisp/emacs-lisp/lisp.el (source)...
> Loading c:/gitemacs/emacs/lisp/textmodes/page.el (source)...
> Loading c:/gitemacs/emacs/lisp/register.el (source)...
> Loading c:/gitemacs/emacs/lisp/textmodes/paragraphs.el (source)...
> Loading c:/gitemacs/emacs/lisp/progmodes/prog-mode.el (source)...
> Loading c:/gitemacs/emacs/lisp/emacs-lisp/lisp-mode.el (source)...
> Loading c:/gitemacs/emacs/lisp/progmodes/elisp-mode.el (source)...
> make[1]: *** [Makefile:808: bootstrap-emacs.pdmp] Segmentation fault
> make[1]: Leaving directory '/c/gitemacs/emacs/src'
> make: *** [Makefile:423: src] Error 2
> --8<---------------cut here---------------end--------------->8---

Please run the crashing command under GDB, and when it crashes, show
the C and Lisp backtraces.

Thanks.