bug#42844: 27.1; Emacs 27.1: SVG file not rendered as image

["gbiotti@gmail.com" <gbiotti@gmail.com>]

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1 - Using Emacs for Windows
https://alpha.gnu.org/gnu/emacs/pretest/windows/emacs-27/emacs-27.1-x86_64.zip
2 - Unzip in C:\Emacs so that the Emacs bin directory is
     C:\emacs\emacs-27.1-x86_64\bin
3 - Exec emacs -Q
4 - Open splash.svg:
     C-x C-f 
C:\emacs\emacs-27.1-x86_64\share\emacs\27.1\etc\images\splash.svg

The image is opened as XML text file (nXML Valid Image) and not rendered as
an image as expected.

Version 26.3 (windows) works ok and splash.svg is rendered as image.






In GNU Emacs 27.1 (build 1, x86_64-w64-mingw32)
  of 2020-08-12 built on CIRROCUMULUS
Repository revision: 86d8d76aa36037184db0b2897c434cdaab1a9ae8
Repository branch: HEAD
Windowing system distributor 'Microsoft Corp.', version 10.0.18362
System Description: Microsoft Windows 10 Pro (v10.0.1903.18362.1016)

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

For information about GNU Emacs and the GNU system, type C-h C-a.
Checking for load-path shadows...
Checking 540 files in c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp...
Checking 82 files in c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/vc...
Checking 64 files in c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/url...
Checking 93 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/textmodes...
Checking 168 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/progmodes...
Checking 50 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/play...
Checking 249 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/org...
Checking 44 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/nxml...
Checking 145 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/net...
Checking 50 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/mh-e...
Checking 86 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/mail...
Checking 1 files in c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/leim...
Checking 78 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/language...
Checking 77 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/international...
Checking 8 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/image...
Checking 205 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/gnus...
Checking 57 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/eshell...
Checking 71 files in c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/erc...
Checking 34 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/emulation...
Checking 180 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/emacs-lisp...
Checking 24 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/cedet...
Checking 59 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/calendar...
Checking 87 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/calc...
Checking 113 files in 
c:/emacs/emacs-27.1-x86_64/share/emacs/27.1/lisp/obsolete...
Checking for load-path shadows...done
Mark set [3 times]
Auto-saving...done
C-c c is undefined
Quit [2 times]
Mark set
C-x <end> is undefined
Quit
Mark activated
Using vacuous schema
Type C-c C-c or C-c C-x to view the image as an image or hex.
Cannot display image: (Invalid image specification)
Auto-saving...done
Mark set [2 times]
Auto-saving...done
Undo
Quit
Mark set
Auto-saving...done
Mark set
next-line: End of buffer [4 times]
Mark set
Auto-saving...done
Mark set


Configured using:
  'configure --without-dbus --host=x86_64-w64-mingw32
  --without-compress-install 'CFLAGS=-O2 -static''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY W32NOTIFY ACL GNUTLS LIBXML2
HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS MODULES THREADS JSON PDUMPER LCMS2 GMP

Important settings:
   value of $LANG: ITA
   locale-coding-system: cp1252


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 dired dired-loaddefs
format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg
epg-config gnus-util rmail rmail-loaddefs text-property-search time-date
subr-x seq byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs
cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel dos-w32 ls-lisp disp-table term/w32-win w32-win w32-vars
term/common-win tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame minibuffer 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 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 threads w32notify w32 lcms2 multi-tty make-network-process
emacs)

Memory information:
((conses 16 46199 8997)
  (symbols 48 6075 1)
  (strings 32 16888 1526)
  (string-bytes 1 523860)
  (vectors 16 9255)
  (vector-slots 8 123182 9492)
  (floats 8 21 254)
  (intervals 56 220 0)
  (buffers 1000 11))