Warning in arabic.c at patchlevel 8.1.1076 in Huge and Big builds only

For instance in Big build:

gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK  -pthread
-I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include
-I/usr/include/pango-1.0 -I/usr/include/atk-1.0 -I/usr/include/cairo
-I/usr/include/pixman-1 -I/usr/include/libdrm -I/usr/include/libpng16
-I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0
-I/usr/include/harfbuzz -I/usr/include/pango-1.0
-I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include
-I/usr/include/freetype2   -O2 -fno-strength-reduce -Wall
-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1        -o objects/arabic.o
arabic.c
arabic.c: In function ‘arabic_shape’:
arabic.c:386:3: warning: ‘curr_c’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
  (*mb_char2bytes)(curr_c, buf);
  ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Best regards,
Tony.

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