Language
C++
Compiler
clang HEAD 9.0.0 (https://github.com/llvm-mirror/clang.git 48ff4162635d886fe75b52395825bfcea1c189dd) (https://github.com/llvm-mirror/llvm.git 8f914744dcfd4c114edfe9c0934d4cd5f3594d78)
Options
Warnings
Boost 1.69.0
C++2a
no pedantic
$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.69.0/clang-head/include -std=c++2a
terminating with uncaught exception of type std::runtime_error: update
Signal:
Aborted