test binary segfault

[chxdeng]

Running the test binary in ubuntu 1804
clang version:
clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

(gdb) r
Starting program: /home/cdeng/managed-ctrie/test-otf-ctrie
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff6872700 (LWP 6864)]
[==========] Running 6 tests from 1 test case.
[----------] Global test environment set-up.
[----------] 6 tests from ctrie_tests
[ RUN ] ctrie_tests.Contains64SingletonStringsOfEachChar

Thread 2 "test-otf-ctrie" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff6872700 (LWP 6864)]
0x0000000000471024 in std::__atomic_base::__atomic_base(unsigned long) ()