mod-subst: :a b b c: :a b b c: : b c: :a c: :x__ 3 x__ 3: 12345 mod-subst-delimiter: 1 two 3 horizontal tabulator 1 two 3 space 1 two 3 exclamation mark 1 two 3 quotation mark 1 two 3 number sign 1 two 3 dollar sign 1 two 3 percent sign 1 two 3 ampersand 1 two 3 apostrophe 1 two 3 left parenthesis 1 two 3 right parenthesis 1 two 3 asterisk 1 two 3 plus sign 1 two 3 comma 1 two 3 hyphen-minus 1 two 3 full stop 1 two 3 solidus 1 two 3 digit 1 two 3 colon 1 two 3 semicolon 1 two 3 less-than sign 1 two 3 equals sign 1 two 3 greater-than sign 1 two 3 question mark 1 two 3 commercial at 1 two 3 capital letter 1 two 3 left square bracket 1 two 3 reverse solidus 1 two 3 right square bracket 1 two 3 circumflex accent 1 two 3 low line 1 two 3 grave accent 1 two 3 small letter 1 two 3 left curly bracket 1 two 3 vertical line 1 two 3 right curly bracket 1 two 3 tilde mod-subst-chain: A B c. make: in target "mod-subst-chain": while evaluating "${:Uvalue:S,a,x,i}." with value "vxlue": Unknown modifier "i" . mod-subst-dollar:$1: mod-subst-dollar:$2: mod-subst-dollar:$3: mod-subst-dollar:$4: mod-subst-dollar:$5: mod-subst-dollar:$6: mod-subst-dollar:$7: mod-subst-dollar:$8: mod-subst-dollar:$40: mod-subst-dollar:U8: mod-subst-dollar:$$$$: mod-subst-dollar:$$$good3 exit status 2