Compling firefox returns error in configuration since v. 54.0.

[Gj Aaftink]

Dear maintainer, compiling firefox returns this error. This is since v
54.0, and I just updated the ports tree again and the problem persists.
There is no config.log file, so I cannot include that. Installed packages
list is attached. Any help will be appreciated.

Kind regards,

Gert-Jan Aaftink

Config output:

checking MOZ_FFI_CFLAGS... -I/usr/local/lib/libffi-3.2.1/include
checking MOZ_FFI_LIBS... -L/usr/local/lib -lffi
checking for rustc... /usr/local/bin/rustc
checking for cargo... /usr/local/bin/cargo
checking rustc version... 1.18.0
checking cargo version...
DEBUG: Executing: `/usr/local/bin/cargo --version --verbose`
DEBUG: The command returned non-zero exit status 101.
DEBUG: Its error output was:
DEBUG: | cargo: environment corrupt; missing value for MAKEOVER
DEBUG: | thread 'main' panicked at 'failed to remove environment variable
`"HOME"`: Bad address (os error 14)', src/libstd/env.rs:352
DEBUG: | note: Run with `RUST_BACKTRACE=1` for a backtrace.
ERROR: Command `/usr/local/bin/cargo --version --verbose` failed with exit
status 101.
*** Fix above errors and then restart with\
               "gmake -f client.mk build"
gmake[2]: *** [/usr/ports/www/firefox/work/firefox-54.0/client.mk:383:
configure] Error 1
gmake[2]: Leaving directory '/usr/ports/www/firefox'
===>  Script "configure" failed unexpectedly.
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