Build fails on clang-5 with libstdc++7-dev (C++17 issue)

[jeking3]

Setup:

  clang-5:  &clang-5  { apt: { packages: [ "clang-5.0",
                                           "libstdc++-7-dev" ], sources: [ "llvm-toolchain-trusty-5.0",
                                                                           "ubuntu-toolchain-r-test"   ] } }

Command:

/home/travis/build/jeking3/boost-root/b2 . toolset=clang-5.0 cxxstd=03,11,14,17 variant=release,debug -j3

Output:

https://travis-ci.org/jeking3/container/jobs/454295432#L1582

clang-linux.compile.c++.without-pth ../../bin.v2/libs/container/test/set_test.test/clang-linux-5.0/release/cxxstd-17-iso/visibility-hidden/set_test.o
../../libs/container/test/set_test.cpp:622:19: error: no viable constructor or deduction guide for deduction of template arguments of 'multiset'
      auto gold = std::multiset({ 1, 2, 3 });
                  ^
...
1 error generated.
  "clang++" -c -x c++ -std=c++17 -fvisibility-inlines-hidden -fPIC -m64 -O3 -Wall -fvisibility=hidden -Wno-inline  -DBOOST_ALL_NO_LIB=1 -DBOOST_CONTAINER_DYN_LINK=1 -DNDEBUG -I"../.." -o "../../bin.v2/libs/container/test/set_test.test/clang-linux-5.0/release/cxxstd-17-iso/visibility-hidden/set_test.o" "../../libs/container/test/set_test.cpp"
...failed clang-linux.compile.c++.without-pth ../../bin.v2/libs/container/test/set_test.test/clang-linux-5.0/release/cxxstd-17-iso/visibility-hidden/set_test.o...

[jeking3]

This is now resolved.

https://travis-ci.org/jeking3/container/builds/454804441