[boost] Builds from boost/status fail early?

Subject: [boost] Builds from boost/status fail early?
From: James E. King III (jking_at_[hidden])
Date: 2018-10-27 17:07:21

Using develop from this morning (tried various combinations of these three
options...):

boost_at_d48d3305d4b4:/boost/status$ ../b2 toolset=clang variant=release
cxxstd=03
...
/boost/tools/build/src/build/feature.jam:491: in validate-value-string from
module feature
error: "shared:" is not a known value of feature <link>
error: legal values: "shared" "static"
/boost/tools/build/src/build/feature.jam:365: in expand-subfeatures-aux
from module feature
/boost/tools/build/src/build/feature.jam:422: in expand-subfeatures from
module feature
/boost/tools/build/src/build/feature.jam:871: in feature.expand from module
feature
/boost/tools/build/src/build/targets.jam:1103: in evaluate-requirements
from module targets
/boost/tools/build/src/build/targets.jam:1121: in common-properties2 from
module targets
/boost/tools/build/src/build/targets.jam:1017: in targets.common-properties
from module targets
/boost/tools/build/src/build/targets.jam:1313: in
class_at_basic-target.generate from module object(typed-target)@47912
/boost/tools/build/src/build/targets.jam:812: in generate-really from
module object(main-target)@70272
/boost/tools/build/src/build/targets.jam:784: in class_at_main-target.generate
from module object(main-target)@70272
/boost/tools/build/src/build/targets.jam:273: in
class_at_project-target.generate from module object(project-target)@47307
/boost/tools/build/src/build/targets.jam:273: in
class_at_project-target.generate from module object(project-target)@4568
/boost/tools/build/src/build-system.jam:797: in load from module
build-system
/boost/tools/build/src/kernel/modules.jam:295: in import from module modules
/boost/tools/build/src/kernel/bootstrap.jam:139: in boost-build from module
/boost/boost-build.jam:17: in module scope from module