make: "varmod-indirect.mk" line 19: while evaluating variable "value" with value "value": Unknown modifier "${"
make: "varmod-indirect.mk" line 52: while evaluating variable "value" with value "value": Unknown modifier "${"
make: "varmod-indirect.mk" line 54: warning: FIXME: this expression should have resulted in a parse error rather than returning the unparsed portion of the expression.
make: "varmod-indirect.mk" line 143: before
make: "varmod-indirect.mk" line 143: after
make: "varmod-indirect.mk" line 151: before
make: "varmod-indirect.mk" line 151: after
make: "varmod-indirect.mk" line 159: before
make: "varmod-indirect.mk" line 159: after
make: "varmod-indirect.mk" line 164: while evaluating variable "UNDEF" with value "": Unknown modifier "Z"
make: "varmod-indirect.mk" line 167: before
make: "varmod-indirect.mk" line 167: after
Parsing line 176: _:=	before ${UNDEF} after
Global: _ = # (empty)
Var_Parse: ${UNDEF} after (eval-keep-dollar-and-undefined)
Global: _ = before ${UNDEF} after
Parsing line 179: _:=	before ${UNDEF:${:US,a,a,}} after
Var_Parse: ${UNDEF:${:US,a,a,}} after (eval-keep-dollar-and-undefined)
Indirect modifier "S,a,a," from "${:US,a,a,}"
Evaluating modifier ${UNDEF:S...} on value "" (eval-keep-dollar-and-undefined, undefined)
Modifier part: "a"
Modifier part: "a"
ModifyWords: split "" into 1 word
Result of ${UNDEF:S,a,a,} is "" (eval-keep-dollar-and-undefined, undefined)
Global: _ = before ${UNDEF:S,a,a,} after
Parsing line 189: _:=	before ${UNDEF:${:U}} after
Var_Parse: ${UNDEF:${:U}} after (eval-keep-dollar-and-undefined)
Indirect modifier "" from "${:U}"
Global: _ = before ${UNDEF:} after
Parsing line 195: _:=	before ${UNDEF:${:UZ}} after
Var_Parse: ${UNDEF:${:UZ}} after (eval-keep-dollar-and-undefined)
Indirect modifier "Z" from "${:UZ}"
Evaluating modifier ${UNDEF:Z} on value "" (eval-keep-dollar-and-undefined, undefined)
make: "varmod-indirect.mk" line 195: while evaluating variable "UNDEF" with value "": Unknown modifier "Z"
Result of ${UNDEF:Z} is error (eval-keep-dollar-and-undefined, undefined)
Global: _ = before ${UNDEF:Z} after
Parsing line 197: .MAKEFLAGS: -d0
ParseDependency(.MAKEFLAGS: -d0)
Global: .MAKEFLAGS =  -r -k -d 0 -d pv -d
Global: .MAKEFLAGS =  -r -k -d 0 -d pv -d 0
make: Fatal errors encountered -- cannot continue
make: stopped in unit-tests
exit status 1