$ git clone https://github.com/facebook/rocksdb.git
$ cd rocksdb
$ CXX=c++ gmake
Makefile:101: Warning: Compiling in debug mode. Don't use the resulting binary in production
...
  CC       table/block_based_table_reader.o
Assertion failed: (E != nullptr && "Expected a valid initializer expression"), function getNewExprFromInitListOrExpr, file /usr/src/lib/clang/libclangsema/../../../contrib/llvm/tools/clang/lib/Sema/SemaExprCXX.cpp, line 2446.
c++: error: unable to execute command: Abort trap (core dumped)
c++: error: clang frontend command failed due to signal (use -v to see invocation)
FreeBSD clang version 3.7.0 (tags/RELEASE_370/final 246257) 20150906
Target: x86_64-unknown-freebsd11.0
Thread model: posix
c++: note: diagnostic msg: PLEASE submit a bug report to https://bugs.freebsd.org/submit/ and include the crash backtrace, preprocessed source, and associated run script.
c++: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
c++: note: diagnostic msg: /tmp/block_based_table_reader-2e94b7.cpp
c++: note: diagnostic msg: /tmp/block_based_table_reader-2e94b7.sh

c++: note: diagnostic msg: 

********************
Makefile:1339: recipe for target 'table/block_based_table_reader.o' failed
gmake: *** [table/block_based_table_reader.o] Error 254