r246057: buildworld fails with: /usr/obj/usr/src/tmp/usr/lib/libc++.so: undefined reference to `std::bad_alloc::~bad_alloc()'

I receive this error since yesterday building world and it is still
sticky on most recent sources (r246057) and I was wondering why the
tinderboxes do not pick this up on the 10.0-CURRENT builds ... just for
a notice for the development folks ...

oh

===> libexec/atf/atf-check (all)
c++ -O3 -pipe -fno-strict-aliasing -march=native -march=native
-DHAVE_CONFIG_H -I/usr/src/libexec/atf/atf-check/../../../contrib/atf
-Qunused-arguments -fstack-protector -Wsystem-headers -Wall
-Wno-format-y2k -W -Wno-unused-parameter -Wpointer-arith
-Wno-uninitialized -Wno-empty-body -Wno-string-plus-int
-Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality
-Wno-unused-function -Wno-conversion -stdlib=libc++ -std=c++11 -c
/usr/src/libexec/atf/atf-check/../../../contrib/atf/atf-sh/atf-check.cpp
c++ -O3 -pipe -fno-strict-aliasing -march=native -march=native
-DHAVE_CONFIG_H -I/usr/src/libexec/atf/atf-check/../../../contrib/atf
-Qunused-arguments -fstack-protector -Wsystem-headers -Wall
-Wno-format-y2k -W -Wno-unused-parameter -Wpointer-arith
-Wno-uninitialized -Wno-empty-body -Wno-string-plus-int
-Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality
-Wno-unused-function -Wno-conversion -stdlib=libc++ -std=c++11
-L/usr/obj/usr/src/libexec/atf/atf-check/../../../lib/atf/libatf-c++
-L/usr/obj/usr/src/libexec/atf/atf-check/../../../lib/atf/libatf-c -o
atf-check atf-check.o -latf-c++ -latf-c
/usr/obj/usr/src/tmp/usr/lib/libc++.so: undefined reference to
`std::bad_alloc::~bad_alloc()'
/usr/obj/usr/src/libexec/atf/atf-check/../../../lib/atf/libatf-c++/libatf-c++.so:
undefined reference to `std::bad_alloc::bad_alloc()'
/usr/obj/usr/src/libexec/atf/atf-check/../../../lib/atf/libatf-c++/libatf-c++.so:
undefined reference to `std::bad_alloc::~bad_alloc()'
/usr/obj/usr/src/tmp/usr/lib/libc++.so: undefined reference to
`std::bad_alloc::bad_alloc()'
c++: error: linker command failed with exit code 1 (use -v to see
invocation)
*** [atf-check] Error code 1

Stop in /usr/src/libexec/atf/atf-check.
*** [all] Error code 1

Stop in /usr/src/libexec/atf.
*** [all] Error code 1

Stop in /usr/src/libexec.
*** [libexec.all__D] Error code 1

Stop in /usr/src.
*** [everything] Error code 1

Stop in /usr/src.
*** [buildworld] Error code 1

Stop in /usr/src.