make: "var-eval-short.mk" line 46: In the :@ modifier of "", the variable name "${FAIL}" must not contain a dollar
make: "var-eval-short.mk" line 46: Malformed conditional (0 && ${:Uword:@${FAIL}@expr@})
CondParser_Eval: 0 && ${0:?${FAIL}then:${FAIL}else}
Var_Parse: ${0:?${FAIL}then:${FAIL}else} (parse-only)
Parsing modifier ${0:?...}
Var_Parse: ${FAIL}then:${FAIL}else} (parse-only)
Modifier part: "${FAIL}then"
Var_Parse: ${FAIL}else} (parse-only)
Modifier part: "${FAIL}else"
Result of ${0:?${FAIL}then:${FAIL}else} is "" (parse-only, defined)
Parsing line 167: DEFINED=	defined
Global: DEFINED = defined
CondParser_Eval: 0 && ${DEFINED:L:?${FAIL}then:${FAIL}else}
Var_Parse: ${DEFINED:L:?${FAIL}then:${FAIL}else} (parse-only)
Parsing modifier ${DEFINED:L}
Result of ${DEFINED:L} is "defined" (parse-only, regular)
Parsing modifier ${DEFINED:?...}
Var_Parse: ${FAIL}then:${FAIL}else} (parse-only)
Modifier part: "${FAIL}then"
Var_Parse: ${FAIL}else} (parse-only)
Modifier part: "${FAIL}else"
Result of ${DEFINED:?${FAIL}then:${FAIL}else} is "defined" (parse-only, regular)
Parsing line 170: .MAKEFLAGS: -d0
ParseDependency(.MAKEFLAGS: -d0)
Global: .MAKEFLAGS =  -r -k -d cpv -d
Global: .MAKEFLAGS =  -r -k -d cpv -d 0
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1