FreeBSD 11.0 i386 buildworld failure

FreeBSD 11.0 i386 Stable

I successfully upgraded from FreeBSD 10.3 to 11.0 Stable on 23 September 2016.
Upon refreshing and rebuilding world to catch the 28 September 2016 Release update,
buildworld failed using the same build options that had worked for the 22 Sept code.
Tail:
> --- all_subdir_usr.bin ---
> --- all_subdir_usr.bin/kdump ---
> --- .depend ---
> echo kdump.full: /usr/obj/usr/src/tmp/usr/lib/libc.a 
> /usr/obj/usr/src/tmp/usr/lib/libsysdecode.a 
> /usr/obj/usr/src/tmp/usr/lib/libcasper.a 
> /usr/obj/usr/src/tmp/usr/lib/libcap_grp.a 
> /usr/obj/usr/src/tmp/usr/lib/libcap_pwd.a >> .depend
> --- kdump_subr.o ---
> clang -O2 -fno-strict-aliasing -pipe -march=core2  
> -I/usr/src/usr.bin/kdump/../ktrace -I/usr/src/usr.bin/kdump 
> -I/usr/src/usr.bin/kdump/../.. -I. -DHAVE_LIBCASPER -g -MD  
> -MF.depend.kdump_subr.o -MTkdump_subr.o -std=gnu99 -fstack-protector-strong 
> -Wsystem-headers -Wall -Wno-format-y2k -W -Wno-unused-parameter 
> -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type 
> -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align 
> -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls 
> -Wold-style-definition -Wno-pointer-sign -Wmissing-variable-declarations 
> -Wthread-safety -Wno-empty-body -Wno-string-plus-int 
> -Wno-unused-const-variable  -Qunused-arguments  -c kdump_subr.c -o kdump_subr.o
> --- all_subdir_usr.bin/drill ---
> /usr/src/usr.bin/drill/../../contrib/ldns/drill/error.c:74:1: warning: no 
> previous prototype for function 'verbose' [-Wmissing-prototypes]
> verbose(const char *fmt, ...)
> ^
> /usr/src/usr.bin/drill/../../contrib/ldns/drill/error.c:88:1: warning: no 
> previous prototype for function 'vverbose' [-Wmissing-prototypes]
> vverbose(const char *fmt, ...)
> ^
> /usr/src/usr.bin/drill/../../contrib/ldns/drill/error.c:108:1: warning: no 
> previous prototype for function 'debug' [-Wmissing-prototypes]
> debug(const char *fmt, ...)
> ^
> 3 warnings generated.
> --- all_subdir_usr.sbin ---
> --- ops_cdfs.o ---
> clang -O2 -fno-strict-aliasing -pipe -march=core2  
> -I/usr/src/usr.sbin/amd/amd/../../../contrib/amd/amd  
> -I/usr/obj/usr/src/tmp/usr/include/rpcsvc -I. -I/usr/src/usr.sbin/amd/amd 
> -I/usr/src/usr.sbin/amd/amd/../include 
> -I/usr/obj/usr/src/usr.sbin/amd/amd/../include 
> -I/usr/src/usr.sbin/amd/amd/../../../contrib/amd/include 
> -I/usr/src/usr.sbin/amd/amd/../../../contrib/amd -DHAVE_CONFIG_H 
> -DHOST_CPU=\"i386\" -DHOST_ARCH=\"i386\" -g -MD  -MF.depend.ops_cdfs.o 
> -MTops_cdfs.o -std=gnu99 -fstack-protector-strong -Wsystem-headers -Werror 
> -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int 
> -Wno-unused-const-variable -Wno-tautological-compare -Wno-unused-value 
> -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 
> -Wno-unused-local-typedef -Wno-switch -Wno-switch-enum 
> -Wno-knr-promoted-parameter -Wno-parentheses  -Qunused-arguments  -c 
> /usr/src/usr.sbin/amd/amd/../../../contrib/amd/amd/ops_cdfs.c -o ops_cdfs.o
> --- all_subdir_usr.bin ---
> --- all_subdir_usr.bin/kdump ---
> kdump_subr.c:1424:7: error: use of undeclared identifier 'TRAP_CAP'
> --- all_subdir_usr.bin/drill ---
> --- root.o ---
> --- all_subdir_usr.bin/kdump ---
>         case TRAP_CAP:
>              ^
> --- all_subdir_usr.bin/drill ---
> clang -O2 -fno-strict-aliasing -pipe 
> -I/usr/src/usr.bin/drill/../../contrib/ldns -march=core2  -g -MD  
> -MF.depend.root.o -MTroot.o -std=gnu99 -fstack-protector-strong 
> -Wsystem-headers -Wall -Wno-format-y2k -W -Wno-unused-parameter 
> -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type 
> -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align 
> -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls 
> -Wold-style-definition -Wno-pointer-sign -Wmissing-variable-declarations 
> -Wthread-safety -Wno-empty-body -Wno-string-plus-int 
> -Wno-unused-const-variable  -Qunused-arguments  -c 
> /usr/src/usr.bin/drill/../../contrib/ldns/drill/root.c -o root.o
> --- all_subdir_usr.bin/kdump ---
> 1 error generated.
> *** [kdump_subr.o] Error code 1
>
> make[4]: stopped in /usr/src/usr.bin/kdump
> 1 error
>
> make[4]: stopped in /usr/src/usr.bin/kdump
> *** [all_subdir_usr.bin/kdump] Error code 2
>
> make[3]: stopped in /usr/src/usr.bin
> --- all_subdir_usr.sbin ---
> A failure has been detected in another branch of the parallel make
>
> make[5]: stopped in /usr/src/usr.sbin/amd/amd
> *** [all_subdir_usr.sbin/amd/amd] Error code 2
>
> make[4]: stopped in /usr/src/usr.sbin/amd
> 1 error
>
> make[4]: stopped in /usr/src/usr.sbin/amd
> *** [all_subdir_usr.sbin/amd] Error code 2
>
> make[3]: stopped in /usr/src/usr.sbin
> 1 error
>
> make[3]: stopped in /usr/src/usr.sbin
> *** [all_subdir_usr.sbin] Error code 2
>
> make[2]: stopped in /usr/src
> --- all_subdir_usr.bin ---
> --- all_subdir_usr.bin/drill ---
> A failure has been detected in another branch of the parallel make
>
> make[4]: stopped in /usr/src/usr.bin/drill
> *** [all_subdir_usr.bin/drill] Error code 2
>
> make[3]: stopped in /usr/src/usr.bin
> --- all_subdir_usr.bin/clang ---
> --- all_subdir_usr.bin/clang/clang-tblgen ---
> A failure has been detected in another branch of the parallel make
>
> make[5]: stopped in /usr/src/usr.bin/clang/clang-tblgen
> *** [all_subdir_usr.bin/clang/clang-tblgen] Error code 2
>
> make[4]: stopped in /usr/src/usr.bin/clang
> --- all_subdir_usr.bin/clang/llvm-tblgen ---
> A failure has been detected in another branch of the parallel make
>
> make[5]: stopped in /usr/src/usr.bin/clang/llvm-tblgen
> *** [all_subdir_usr.bin/clang/llvm-tblgen] Error code 2
>
> make[4]: stopped in /usr/src/usr.bin/clang
> 2 errors
>
> make[4]: stopped in /usr/src/usr.bin/clang
> *** [all_subdir_usr.bin/clang] Error code 2
>
> make[3]: stopped in /usr/src/usr.bin
> 3 errors
>
> make[3]: stopped in /usr/src/usr.bin
> *** [all_subdir_usr.bin] Error code 2
>
> make[2]: stopped in /usr/src
> 2 errors
>
> make[2]: stopped in /usr/src
> *** [everything] Error code 2
>
> make[1]: stopped in /usr/src
> 1 error
>
> make[1]: stopped in /usr/src
> *** [buildworld] Error code 2
>
> make: stopped in /usr/src
> 1 error
>
> make: stopped in /usr/src
> BEASTIE#