make: "varmod-to-separator.mk" line 107: Invalid character number: 400:tu}

make: "varmod-to-separator.mk" line 107: Malformed conditional (${WORDS:[1..3]:ts\400:tu})
make: "varmod-to-separator.mk" line 121: Invalid character number: 100:tu}

make: "varmod-to-separator.mk" line 121: Malformed conditional (${WORDS:[1..3]:ts\x100:tu})
make: Bad modifier `:ts\-300' for WORDS
make: "varmod-to-separator.mk" line 128: Malformed conditional (${WORDS:[1..3]:ts\-300:tu})
make: Bad modifier `:ts\8' for 1 2 3
make: "varmod-to-separator.mk" line 136: Malformed conditional (${1 2 3:L:ts\8:tu})
make: Bad modifier `:ts\100L' for 1 2 3
make: "varmod-to-separator.mk" line 143: Malformed conditional (${1 2 3:L:ts\100L})
make: Bad modifier `:ts\x40g' for 1 2 3
make: "varmod-to-separator.mk" line 150: Malformed conditional (${1 2 3:L:ts\x40g})
make: Bad modifier `:tx' for WORDS
make: "varmod-to-separator.mk" line 158: Malformed conditional (${WORDS:tx} != "anything")
make: Bad modifier `:t\X' for WORDS
make: "varmod-to-separator.mk" line 165: Malformed conditional (${WORDS:t\X} != "anything")
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1