clang segfaults

[bat-serjo]

I'm using stock ubuntu clang-6.0.0
Trying to build the example mruby as instructed.
Problem: clang segfaults. What version do you use?

serj@rocket:~/_o/netstock/nautilus/forksrv/instrument/mruby$ make
ruby ./minirake
(in /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby)
CC    mrbgems/mruby-compiler/core/codegen.c -> build/test/mrbgems/mruby-compiler/core/codegen.o



==================================================== 
linking: false
running -g -std=gnu99 -O3 -Wall -Werror-implicit-function-declaration -Wdeclaration-after-statement -Wwrite-strings -Wundef -g3 -O0 -DMRB_DEBUG -DMRBGEM_MRUBY_COMPILER_VERSION=0.0.0 -I/home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/include -MMD -o /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.o -c /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/mrbgems/mruby-compiler/core/codegen.c
 =>
 -Qunused-arguments -Xclang -load -Xclang /home/serj/_o/netstock/nautilus/forksrv/instrument/clang_wrapper/afl-llvm-pass.so -g -std=gnu99 -O3 -Wall -Werror-implicit-function-declaration -Wdeclaration-after-statement -Wwrite-strings -Wundef -g3 -O0 -DMRB_DEBUG -DMRBGEM_MRUBY_COMPILER_VERSION=0.0.0 -I/home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/include -MMD -o /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.o -c /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/mrbgems/mruby-compiler/core/codegen.c -v -ggdb3 -O3 -funroll-loops -DREDQUEEN_FUZZER=1
==================================================== 



clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
 "/usr/lib/llvm-6.0/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -disable-free -disable-llvm-verifier -discard-value-names -main-file-name codegen.c -mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -momit-leaf-frame-pointer -v -coverage-notes-file /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.gcno -resource-dir /usr/lib/llvm-6.0/lib/clang/6.0.0 -dependency-file /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.d -MT /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.o -D MRB_DEBUG -D MRBGEM_MRUBY_COMPILER_VERSION=0.0.0 -I /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/include -D REDQUEEN_FUZZER=1 -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-6.0/lib/clang/6.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wall -Werror-implicit-function-declaration -Wdeclaration-after-statement -Wwrite-strings -Wundef -std=gnu99 -fconst-strings -fdebug-compilation-dir /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby -ferror-limit 19 -fmessage-length 172 -funroll-loops -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -load /home/serj/_o/netstock/nautilus/forksrv/instrument/clang_wrapper/afl-llvm-pass.so -o /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.o -x c /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/mrbgems/mruby-compiler/core/codegen.c
clang -cc1 version 6.0.0 based upon LLVM 6.0.0 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/include
 /usr/local/include
 /usr/lib/llvm-6.0/lib/clang/6.0.0/include
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
rofl-llvm-pass  ripped of from afl-llvm-pass by <lszekeres@google.com>
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: note: diagnostic msg: Error generating preprocessed source(s).
rake aborted!
Command Failed: [/home/serj/_o/netstock/nautilus/forksrv/instrument/clang_wrapper/redqueen-clang -g -std=gnu99 -O3 -Wall -Werror-implicit-function-declaration -Wdeclaration-after-statement -Wwrite-strings -Wundef -g3 -O0 -DMRB_DEBUG -DMRBGEM_MRUBY_COMPILER_VERSION=0.0.0 -I/home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/include -MMD -o /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/build/test/mrbgems/mruby-compiler/core/codegen.o -c /home/serj/_o/netstock/nautilus/forksrv/instrument/mruby/mrbgems/mruby-compiler/core/codegen.c]

Makefile:8: recipe for target 'all' failed
make: *** [all] Error 1

[bat-serjo]

works with clang-3.9 lowest possible to install from packages.