Firefox build fails in cargo, with a segfault.

[bob prohaska]

The latest attempts to compile www/firefox stopped with:
 
gmake[4]: *** [/usr/ports/www/firefox/work/firefox-79.0/config/makefiles/rust.mk:294: force-cargo-library-build] Segmentation fault (core dumped)
gmake[3]: *** [/usr/ports/www/firefox/work/firefox-79.0/config/recurse.mk:72: toolkit/library/rust/target] Error 2
gmake[2]: *** [/usr/ports/www/firefox/work/firefox-79.0/config/recurse.mk:34: compile] Error 2
gmake[1]: *** [/usr/ports/www/firefox/work/firefox-79.0/config/rules.mk:390: all] Error 2

This is on a Raspberry Pi3 running -current at r363786, cargo is at 1.45.0,
ports are at 544659.

Thanks for reading, any suggestions appreciated!

bob prohaska