bug#37306: 27.0.50; Type Mismatch When Customizing network-security-protocol-checks

[T.V Raman]

Subject line pretty much says it all
M-x Customize-variable RET network-security-protocol-checks RET
shows a type mismatch error in the *customize* buffer, and
consequently does not produce the customization UI as intended 
In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll 
bars)
 of 2019-09-01 built on raman-glaptop
Repository revision: e715680aee8b461aba18fe2f667fc5592c99a29a
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description: Debian GNU/Linux 10 (buster)

Recent messages:
 Quit
Creating customization items...
Creating customization items ...done
Creating customization setup...done
 Search failed: "Network Security Protocol Checks"
C-M-g is undefined
 Quit
Mark set [2 times]
marked S expression containing 32 characters
region containing 1 lines copied to kill ring 

Configured using:
 'configure --enable-silent-rules --with-x-toolkit=lucid
 --with-mailutils --with-modules --without-compress-install'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT
LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS LUCID X11 XDBE XIM MODULES THREADS
JSON PDUMPER LCMS2 GMP

Important settings:
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  value of $XMODIFIERS: @im=none
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Major mode: Emacs-Lisp

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  yas-minor-mode: t
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  ido-ubiquitous-mode: t
  dynamic-completion-mode: t
  disable-mouse-global-mode: t
  midnight-mode: t
  save-place-mode: t
  savehist-mode: t
  shell-dirtrack-mode: t
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  global-voice-lock-mode: t
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  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  auto-fill-function: yas--auto-fill
  transient-mark-mode: t
  abbrev-mode: t
  hs-minor-mode: t

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Features:
(shadow emacsbug mailalias emacspeak-net-utils net-utils flow-fill
amixer eieio-opt emacspeak-speedbar speedbar ...)

Memory information:
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 (symbols 48 97773 57)
 (strings 32 464513 178241)
 (string-bytes 1 17579399)
 (vectors 16 206161)
 (vector-slots 8 4124637 563994)
 (floats 8 2618 1601)
 (intervals 56 879191 14870)
 (buffers 992 99))


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