New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/33730#issuecomment-955578597

Comment:
```
case $- in *e*) set +e;; esac; srcdirstrip=`echo "." | sed 's|.|.|g'`; case $p in ./*) f=`echo "$p" | sed "s|^$srcdirstrip/||"`;; *) f=$p;; esac; { mgn= red= grn= lgn= blu= brg= std=; am__color_tests=no; if test "X" = Xno; then am__color_tests=no; elif test "X" = Xalways; then am__color_tests=yes; elif test "X$TERM" != Xdumb && { test -t 1; } 2>/dev/null; then am__color_tests=yes; fi; if test $am__color_tests = yes; then red=''; grn=''; lgn=''; blu=''; mgn=''; brg=''; std=''; fi; }; srcdir=.; export srcdir; case "test-mbrtowc4.sh.log" in */*) am__odir=`echo "./test-mbrtowc4.sh.log" | sed 's|/[^/]*$||'`;; *) am__odir=.;; esac; test "x$am__odir" = x"." || test -d "$am__odir" || /usr/bin/mkdir -p "$am__odir" || exit $?; if test -f "./$f"; then dir=./; elif test -f "$f"; then dir=; else dir="./"; fi; tst=$dir$f; log='test-mbrtowc4.sh.log'; if test -n ''; then am__enable_hard_errors=no; else am__enable_hard_errors=yes; fi; case "  " in *[\ \	]$f[\ \	]* | *[\ \	]$dir$f[\ \	]*) am__expect_failure=yes;; *) am__expect_failure=no;; esac;  EXEEXT='' srcdir='.' LOCALE_FR='none' LOCALE_FR_UTF8='none' LIBSIGSEGV='' LOCALE_FR='none' LOCALE_TR_UTF8='none' LOCALE_FR='none' LOCALE_FR_UTF8='none' LOCALE_JA='none' LOCALE_ZH_CN='none' LOCALE_FR='none' LOCALE_FR_UTF8='none' LOCALE_JA='none' LOCALE_ZH_CN='none' LOCALE_FR='none' LOCALE_FR_UTF8='none' LOCALE_JA='none' LOCALE_ZH_CN='none' LOCALE_FR_UTF8='none' LOCALE_FR_UTF8='none' LOCALE_ZH_CN='none' LOCALE_FR='none' LOCALE_FR_UTF8='none' LOCALE_FR='none' LOCALE_FR_UTF8='none' LOCALE_JA='none' LOCALE_ZH_CN='none' LOCALE_FR='none' LOCALE_FR_UTF8='none' abs_aux_dir='/builddir/m4-1.4.19/build-aux' abs_aux_dir='/builddir/m4-1.4.19/build-aux' MAKE='make' LOCALE_FR='none' LOCALE_FR_UTF8='none' LOCALE_JA='none' LOCALE_ZH_CN='none' /bin/sh ../build-aux/test-driver --test-name "$f" \
--log-file $b.log --trs-file $b.trs \
--color-tests "$am__color_tests" --enable-hard-errors "$am__enable_hard_errors" --expect-failure "$am__expect_failure"   --    \
"$tst" 
../build-aux/test-driver: the following mandatory options are missing: --test-name
Usage:
  test-driver --test-name NAME --log-file PATH --trs-file PATH
              [--expect-failure {yes|no}] [--color-tests {yes|no}]
              [--enable-hard-errors {yes|no}] [--]
              TEST-SCRIPT [TEST-SCRIPT-ARGUMENTS]

The '--test-name', '--log-file' and '--trs-file' options are mandatory.
```

this test failure is new, I wonder what's up. Looks to be `"$f"` possibly being empty?