i386-current ICE/Bus error building wxGTK30?

["John D. Baker" <jdbaker%consolidated.net@localhost>]

Building wxGTK30 (pkgsrc-2019Q4) on i386-current (9.99.38) fails with
an internal compiler error/Bus error:

[...]
/d0/build/pkgsrc/x11/wxGTK30/work/wxWidgets-3.0.4/bk-make-pch ./.pch/wxprec_xmldll/wx/wxprec.h.gch wx/wxprec.h c++ -I./.pch/wxprec_xmldll -D__WXGTK__        -DWXBUILDING       -I./src/regex   -DwxUSE_GUI=0 -DWXUSINGDLL -DWXMAKINGDLL_XML -fPIC -DPIC  -Wall -Wundef -Wunused-parameter -Wno-ctor-dtor-privacy -Woverloaded-virtual -D_FILE_OFFSET_BITS=64 -I/d0/build/pkgsrc/x11/wxGTK30/work/wxWidgets-3.0.4/lib/wx/include/gtk3-unicode-3.0 -I./include -I/usr/pkg/include/gtk-3.0 -I/usr/pkg/include/pango-1.0 -I/usr/pkg/include -I/usr/pkg/include/glib-2.0 -I/usr/pkg/lib/glib-2.0/include -I/usr/pkg/include/harfbuzz -I/usr/pkg/include/fribidi -I/usr/X11R7/include -I/usr/X11R7/include/freetype2 -I/usr/pkg/include/cairo -I/usr/X11R7/include/pixman-1 -I/usr/pkg/include/libpng16 -I/usr/pkg/include/gdk-pixbuf-2.0 -D_REENTRANT -I/usr/pkg/include/gio-unix-2.0 -D_REENTRANT -I/usr/pkg/include/atk-1.0 -I/usr/pkg/include/at-spi2-atk/2.0 -I/usr/pkg/include/at-spi-2.0 -I/usr/pkg/include/dbus-1.0 -I/usr/pkg/lib/dbus-1.0/include -D_REENTRANT -pthread -I/usr/pkg/include/gstreamer-1.0 -I/usr/pkg/include/glib-2.0 -I/usr/pkg/lib/glib-2.0/include -I/usr/pkg/include -pthread -I/usr/pkg/include/orc-0.4 -D_NETBSD_SOURCE -D_LIBC -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/glib-2.0 -I/usr/pkg/include/gio-unix-2.0 -I/usr/pkg/lib/glib-2.0/include -I/usr/X11R7/include -I/usr/X11R7/include/freetype2 -I/usr/X11R7/include/libdrm -DWX_PRECOMP -pthread -I/usr/pkg/include/gtk-3.0/unix-print -I/usr/pkg/include/gtk-3.0 -I/usr/pkg/include/pango-1.0 -I/usr/pkg/include -I/usr/pkg/include/glib-2.0 -I/usr/pkg/lib/glib-2.0/include -I/usr/pkg/include/harfbuzz -I/usr/pkg/include/fribidi -I/usr/X11R7/include -I/usr/X11R7/include/freetype2 -I/usr/pkg/include/cairo -I/usr/X11R7/include/pixman-1 -I/usr/pkg/include/libpng16 -I/usr/pkg/include/gdk-pixbuf-2.0 -D_REENTRANT -I/usr/pkg/include/gio-unix-2.0 -D_REENTRANT -I/usr/pkg/include/atk-1.0 -I/usr/pkg/include/at-spi2-atk/2.0 -I/usr/pkg/include/at-spi-2.0 -I/usr/pkg/include/dbus-1.0 -I/usr/pkg/lib/dbus-1.0/include -D_REENTRANT -D_REENTRANT -pthread -O2 -D_FORTIFY_SOURCE=2 -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/glib-2.0 -I/usr/pkg/include/gio-unix-2.0 -I/usr/pkg/lib/glib-2.0/include -I/usr/X11R7/include -I/usr/X11R7/include/freetype2 -I/usr/X11R7/include/libdrm
g++: internal compiler error: Bus error signal terminated program cc1plus
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://www.NetBSD.org/support/send-pr.html> for instructions.
*** [./.pch/wxprec_xmldll/wx/wxprec.h.gch] Error code 4

make: stopped in /d0/build/pkgsrc/x11/wxGTK30/work/wxWidgets-3.0.4
1 error

make: stopped in /d0/build/pkgsrc/x11/wxGTK30/work/wxWidgets-3.0.4
*** Error code 2

Stop.
make[1]: stopped in /x/pkgsrc/x11/wxGTK30
*** Error code 1

Stop.
make: stopped in /x/pkgsrc/x11/wxGTK30


The substring "pch" in the above sounds like "pre-compiled headers" which
seems to be a persistent problem with GCC on i386 although usually only
an issue with "boost-libs".

There was no issue with the same machine building wxGTK30 under 9.0_RC1.

I haven't seen any bulk builds using i386-current for comparison.

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