--text follows this line--

Editing a C header file and trying to add a doxygen-style comment.  I
tried to enter an open parenthesis in the comment and emacs hangs.  I
was able to replicate this multiple times.  I was able to narrow it down
to these lines being present in the file:

/* make sure LogStorageTable_t is packed */
COMPILE_TIME_ASSERT(sizeof(LogStorageTable_t) == ((sizeof(LogStorageArea_t) *
                                                   LOG_STORAGE_NUM) +
                                                  sizeof(uint16_t)));

/** hang if open parenthesis is pressed here -> 

Entering a open parenthesis in the above line causes emacs to hang.  I
sent signal USR2 to the process and got the attached screen shot (sorry,
couldn't cut and paste from the emacs window after the hang).



In GNU Emacs 26.1 (build 1, x86_64-unknown-cygwin, GTK+ Version 3.22.28)
 of 2018-05-28 built on DESKTOP
Repository revision: d802fa4a0642157d7aff9a9d599785df7604e4d1
Windowing system distributor 'The Cygwin/X Project', version 11.0.12000000
Recent messages:
Fill column set to 79 (was 70)
For information about GNU Emacs and the GNU system, type <f1> C-a.
Making completion list... [2 times]

Configured using:
 'configure
 --srcdir=/home/kbrown/src/cygemacs/emacs-26.1-1.x86_64/src/emacs-26.1
 --prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc
 --docdir=/usr/share/doc/emacs --htmldir=/usr/share/doc/emacs/html -C
 'CFLAGS=-ggdb -O2 -pipe -Wall -Werror=format-security
 -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong
 --param=ssp-buffer-size=4
 -fdebug-prefix-map=/home/kbrown/src/cygemacs/emacs-26.1-1.x86_64/build=/usr/src/debug/emacs-26.1-1
 -fdebug-prefix-map=/home/kbrown/src/cygemacs/emacs-26.1-1.x86_64/src/emacs-26.1=/usr/src/debug/emacs-26.1-1'
 CPPFLAGS= LDFLAGS='

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY ACL
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11 THREADS LCMS2

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv
bytecomp byte-compile cconv cl-loaddefs cl-lib dired dired-loaddefs
format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg
epg-config gnus-util rmail rmail-loaddefs mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils elec-pair time-date
mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote dbusbind gfilenotify
lcms2 dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 95955 10383)
 (symbols 48 20382 1)
 (miscs 40 39 143)
 (strings 32 28537 1006)
 (string-bytes 1 747190)
 (vectors 16 14589)
 (vector-slots 8 495926 9216)
 (floats 8 50 87)
 (intervals 56 248 0)
 (buffers 992 12))

Inline image