Crash while indexing

[gicmo]

ccls --version
ccls version 7.0.0 (Fedora 7.0.0-2.fc29)

Built using system clang/llvm (llvm-7.0.0-2.fc29.src.rpm); configured via cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -BRelWithDebInfo -DCMAKE_INSTALL_PREFIX=/usr -DSYSTEM_CLANG=On -DUSE_SHARED_LLVM=On -GNinja ..

I get a crash when indexing bolt, reproducible on the commandline via cls -index=/home/gicmo/Code/src/bolt:

0  0x00007ffff2bfa53f in raise () from /lib64/libc.so.6
1  0x00007ffff2be4895 in abort () from /lib64/libc.so.6
2  0x00007ffff684b3c8 in std::__replacement_assert (__file=__file@entry=0x7ffff6936d30 "/usr/include/c++/8/bits/shared_ptr_base.h", __line=__line@entry=983, __function=__function@entry=0x7ffff6971b80 <std::__shared_ptr_access<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2, false, false>::operator*() const::__PRETTY_FUNCTION__> "std::__shared_ptr_access<_Tp, _Lp, <anonymous>, <anonymous> >::element_type& std::__shared_ptr_access<_Tp, _Lp, <anonymous>, <anonymous> >::operator*() const [with _Tp = llvm::sys::fs::detail::DirIter"..., __condition=__condition@entry=0x7ffff6936d15 "_M_get() != nullptr") at /usr/include/c++/8/x86_64-redhat-linux/bits/c++config.h:2391
3  0x00007ffff68c4b2d in std::__shared_ptr_access<llvm::sys::fs::detail::DirIterState, (__gnu_cxx::_Lock_policy)2, false, false>::operator* (this=0x5c6c20) at /usr/include/llvm/ADT/StringRef.h:90
4  llvm::sys::fs::directory_iterator::directory_iterator (follow_symlinks=true, ec=..., path=..., this=0x5c6c20) at /usr/include/llvm/Support/FileSystem.h:1163
5  (anonymous namespace)::RealFSDirIter::RealFSDirIter (EC=..., Path=..., this=0x5c6bc0) at /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Basic/VirtualFileSystem.cpp:302
6  __gnu_cxx::new_allocator<(anonymous namespace)::RealFSDirIter>::construct<(anonymous namespace)::RealFSDirIter, llvm::Twine const&, std::error_code&> (this=<optimized out>, __p=0x5c6bc0) at /usr/include/c++/8/ext/new_allocator.h:136
7  std::allocator_traits<std::allocator<(anonymous namespace)::RealFSDirIter> >::construct<(anonymous namespace)::RealFSDirIter, llvm::Twine const&, std::error_code&> (__a=..., __p=0x5c6bc0) at /usr/include/c++/8/bits/alloc_traits.h:475
8  std::_Sp_counted_ptr_inplace<(anonymous namespace)::RealFSDirIter, std::allocator<(anonymous namespace)::RealFSDirIter>, (__gnu_cxx::_Lock_policy)2>::_Sp_counted_ptr_inplace<llvm::Twine const&, std::error_code&> (__a=..., this=0x5c6bb0) at /usr/include/c++/8/bits/shared_ptr_base.h:543
9  std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<(anonymous namespace)::RealFSDirIter, std::allocator<(anonymous namespace)::RealFSDirIter>, llvm::Twine const&, std::error_code&> (__a=..., this=<optimized out>) at /usr/include/c++/8/bits/shared_ptr_base.h:656
10 std::__shared_ptr<(anonymous namespace)::RealFSDirIter, (__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<(anonymous namespace)::RealFSDirIter>, llvm::Twine const&, std::error_code&> (__a=..., this=<optimized out>, __tag=...) at /usr/include/c++/8/bits/shared_ptr_base.h:1322
11 std::shared_ptr<(anonymous namespace)::RealFSDirIter>::shared_ptr<std::allocator<(anonymous namespace)::RealFSDirIter>, llvm::Twine const&, std::error_code&> (__a=..., this=<optimized out>, __tag=...) at /usr/include/c++/8/bits/shared_ptr.h:360
12 std::allocate_shared<(anonymous namespace)::RealFSDirIter, std::allocator<(anonymous namespace)::RealFSDirIter>, llvm::Twine const&, std::error_code&> (__a=...) at /usr/include/c++/8/bits/shared_ptr.h:707
13 std::make_shared<(anonymous namespace)::RealFSDirIter, llvm::Twine const&, std::error_code&> () at /usr/include/c++/8/bits/shared_ptr.h:723
14 (anonymous namespace)::RealFileSystem::dir_begin (this=this@entry=0x608a40, Dir=..., EC=...) at /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Basic/VirtualFileSystem.cpp:332
15 0x00007ffff6b4dcaa in clang::driver::toolchains::Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple (this=0x61ae90, TargetTriple=..., Args=..., LibDir="/../lib64", CandidateTriple=..., NeedsBiarchSuffix=false) at /usr/include/llvm/ADT/Twine.h:516
16 0x00007ffff6b4fd87 in clang::driver::toolchains::Generic_GCC::GCCInstallationDetector::init (this=this@entry=0x61ae90, TargetTriple=..., Args=..., ExtraTripleAliases=...) at /usr/include/c++/8/bits/basic_string.h:2293
17 0x00007ffff6b60400 in clang::driver::toolchains::Linux::Linux (this=0x61a950, D=..., Triple=..., Args=...) at /usr/include/llvm/ADT/ArrayRef.h:64
18 0x00007ffff6aa3bb0 in llvm::make_unique<clang::driver::toolchains::Linux, clang::driver::Driver const&, llvm::Triple const&, llvm::opt::ArgList const&> () at /usr/include/llvm/ADT/STLExtras.h:1069
19 clang::driver::Driver::getToolChain (this=0x7fffffffb9d0, Args=..., Target=...) at /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Driver/Driver.cpp:4327
20 0x00007ffff6ab2586 in clang::driver::Driver::BuildCompilation (this=this@entry=0x7fffffffb9d0, ArgList=...) at /usr/include/c++/8/bits/unique_ptr.h:342
21 0x0000000000496740 in ccls::(anonymous namespace)::ProjectProcessor::Process (this=0x7fffffffc510, entry=...) at /usr/include/c++/8/bits/stl_vector.h:1059
22 0x000000000049a1ca in ccls::(anonymous namespace)::LoadEntriesFromDirectory (opt_compdb_dir=..., project=0x7fffffffc570) at ../src/project.cc:370
23 ccls::Project::Load (this=0x7fffffffd180, root="/home/gicmo/Code/src/bolt/") at ../src/project.cc:401
24 0x000000000050e1f0 in ccls::Initialize (m=0x7fffffffd2a0, param=..., reply=...) at ../src/messages/initialize.cc:324
25 0x00000000005105fa in ccls::StandaloneInitialize (handler=..., root="/home/gicmo/Code/src/bolt") at ../src/messages/initialize.cc:360
26 0x000000000048926c in ccls::pipeline::Standalone (root="/home/gicmo/Code/src/bolt") at ../src/pipeline.cc:571
27 0x0000000000455b20 in main (argc=<optimized out>, argv=<optimized out>) at /usr/include/c++/8/bits/basic_string.h:252

[gicmo]

Since we seem to get ENOENT I ran it through strace:

strace -ff -e openat ccls -index=/home/gicmo/Code/src/bolt
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangIndex.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangFormat.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangTooling.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangToolingInclusions.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangToolingCore.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangRewrite.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangFrontend.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangParse.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangSerialization.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangSema.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangAnalysis.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangEdit.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangAST.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangLex.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangDriver.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangBasic.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libLLVM-7.so", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libncurses.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libtinfo.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libform.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libclangASTMatchers.so.7", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libffi.so.6", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libedit.so.0", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/proc/cpuinfo", O_RDONLY|O_CLOEXEC) = 3
strace: Process 3002 attached
strace: Process 3003 attached
strace: Process 3004 attached
[pid  3001] openat(AT_FDCWD, "/etc/localtime", O_RDONLY|O_CLOEXEC) = 3
[pid  3001] openat(AT_FDCWD, "/home/gicmo/Code/src/bolt/compile_flags.txt", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/home/gicmo/Code/src/bolt/compile_commands.json", O_RDONLY|O_CLOEXEC) = 3
[pid  3001] openat(AT_FDCWD, "/etc/lsb-release", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/redhat-release", O_RDONLY|O_CLOEXEC) = 3
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-unknown-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-redhat-linux6E", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-redhat-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-suse-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-slackware-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-manbo-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-amazon-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-unknown-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-pc-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-unknown-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-x86_64-unknown-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i386-redhat-linux6E", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i686-redhat-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i586-redhat-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i386-redhat-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i586-suse-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i486-slackware-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i686-montavista-linux", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i686-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i686-pc-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i486-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i386-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i586-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3001] openat(AT_FDCWD, "/etc/env.d/gcc/config-i386-unknown-linux-gnu", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
/usr/include/c++/8/bits/shared_ptr_base.h:983: std::__shared_ptr_access<_Tp, _Lp, <anonymous>, <anonymous> >::element_type& std::__shared_ptr_access<_Tp, _Lp, <anonymous>, <anonymous> >::operator*() const [with _Tp = llvm::sys::fs::detail::DirIterState; __gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2; bool <anonymous> = false; bool <anonymous> = false; std::__shared_ptr_access<_Tp, _Lp, <anonymous>, <anonymous> >::element_type = llvm::sys::fs::detail::DirIterState]: Assertion '_M_get() != nullptr' failed.
[pid  3001] --- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=3001, si_uid=1000} ---
[pid  3001] --- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=3001, si_uid=1000} ---
[pid  3001] openat(AT_FDCWD, "/dev/urandom", O_RDONLY) = 3
[pid  3001] openat(AT_FDCWD, "/tmp/symbolizer-input-42749e", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0600) = 3
[pid  3001] openat(AT_FDCWD, "/tmp/symbolizer-output-8fceb5", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0600) = 4
strace: Process 3005 attached
[pid  3005] openat(AT_FDCWD, "/tmp/symbolizer-input-42749e", O_RDONLY) = 0
[pid  3005] openat(AT_FDCWD, "/tmp/symbolizer-output-8fceb5", O_WRONLY|O_CREAT, 0666) = 1
[pid  3005] openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libLLVM-7.so", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libffi.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libedit.so.0", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libtinfo.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/proc/cpuinfo", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libLLVM-7.so", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib64/libLLVM-7.so-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib64/.debug/libLLVM-7.so-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libLLVM-7.so-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libLLVM-7.so-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib64/libpthread-2.28.so.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib64/.debug/libpthread-2.28.so.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libpthread-2.28.so.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib64/libc-2.28.so.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib64/.debug/libc-2.28.so.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libc-2.28.so.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/lib64/libclangBasic.so.7", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib64/libclangBasic.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib64/.debug/libclangBasic.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libclangBasic.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libclangBasic.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/lib64/libclangDriver.so.7", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib64/libclangDriver.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib64/.debug/libclangDriver.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libclangDriver.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "/usr/lib/debug/usr/lib64/libclangDriver.so.7-7.0.0-2.fc29.x86_64.debug", O_RDONLY|O_CLOEXEC) = 3
[pid  3005] openat(AT_FDCWD, "ccls", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
LLVMSymbolizer: error reading file: No such file or directory
[pid  3005] +++ exited with 0 +++
[pid  3001] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3005, si_uid=1000, si_status=0, si_utime=158, si_stime=20} ---
[pid  3001] openat(AT_FDCWD, "/tmp/symbolizer-output-8fceb5", O_RDONLY|O_CLOEXEC) = 3
0 0x00007f11b5fd795e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /usr/src/debug/llvm-7.0.0-2.fc29.x86_64/_build/../lib/Support/Unix/Signals.inc:494:3
1 0x00007f11b5fd5e14 llvm::sys::RunSignalHandlers() /usr/src/debug/llvm-7.0.0-2.fc29.x86_64/_build/../lib/Support/Signals.cpp:67:5
2 0x00007f11b5fd5f95 SignalHandler /usr/src/debug/llvm-7.0.0-2.fc29.x86_64/_build/../lib/Support/Unix/Signals.inc:343:31
3 0x00007f11b53c2070 __restore_rt (/lib64/libpthread.so.0+0x13070)
4 0x00007f11b522153f __GI_raise (/lib64/libc.so.6+0x3853f)
5 0x00007f11b520b895 __GI_abort (/lib64/libc.so.6+0x22895)
6 0x00007f11b8e723c8 (/lib64/libclangBasic.so.7+0x1693c8)
7 0x00007f11b8eebb2d /usr/include/c++/8/bits/shared_ptr_base.h:983:2
8 0x00007f11b9174caa /usr/include/c++/8/bits/basic_string.h:218:7
9 0x00007f11b9174caa /usr/include/c++/8/bits/basic_string.h:220:6
10 0x00007f11b9174caa clang::driver::toolchains::Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple(llvm::Triple const&, llvm::opt::ArgList const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, llvm::StringRef, bool) /usr/include/c++/8/bits/basic_string.h:657:9
11 0x00007f11b9176d87 clang::driver::toolchains::Generic_GCC::GCCInstallationDetector::init(llvm::Triple const&, llvm::opt::ArgList const&, llvm::ArrayRef<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >) /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Driver/ToolChains/Gnu.cpp:1720:29
12 0x00007f11b9187400 clang::driver::MultilibSet::operator=(clang::driver::MultilibSet const&) /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Driver/ToolChains/Linux.cpp:212:3
13 0x00007f11b9187400 clang::driver::toolchains::Linux::Linux(clang::driver::Driver const&, llvm::Triple const&, llvm::opt::ArgList const&) /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Driver/ToolChains/Linux.cpp:212:44
14 0x00007f11b90cabb0 _ZN4llvm11make_uniqueIN5clang6driver10toolchains5LinuxEJRKNS2_6DriverERKNS_6TripleERKNS_3opt7ArgListEEEENSt9enable_ifIXntsrSt8is_arrayIT_E5valueESt10unique_ptrISH_St14default_deleteISH_EEE4typeEDpOT0_ /usr/include/llvm/ADT/STLExtras.h:1070:29
15 0x00007f11b90cabb0 clang::driver::Driver::getToolChain(llvm::opt::ArgList const&, llvm::Triple const&) const /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Driver/Driver.cpp:4327:50
16 0x00007f11b90d9586 /usr/include/c++/8/bits/basic_string.h:211:26
17 0x00007f11b90d9586 /usr/include/c++/8/bits/basic_string.h:220:6
18 0x00007f11b90d9586 /usr/include/c++/8/bits/basic_string.h:657:9
19 0x00007f11b90d9586 /usr/include/llvm/ADT/Triple.h:44:7
20 0x00007f11b90d9586 clang::driver::Driver::BuildCompilation(llvm::ArrayRef<char const*>) /usr/src/debug/clang-7.0.0-2.fc29.x86_64/lib/Driver/Driver.cpp:1015:34
21 0x0000000000496740 (ccls+0x496740)
22 0x000000000049a1ca (ccls+0x49a1ca)
23 0x000000000050e1f0 (ccls+0x50e1f0)
24 0x00000000005105fa (ccls+0x5105fa)
25 0x000000000048926c (ccls+0x48926c)
26 0x0000000000455b20 (ccls+0x455b20)
27 0x00007f11b520d413 __libc_start_main (/lib64/libc.so.6+0x24413)
28 0x0000000000455e9e (ccls+0x455e9e)
[pid  3001] --- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=3001, si_uid=1000} ---
[pid  3004] +++ killed by SIGABRT (core dumped) +++
[pid  3003] +++ killed by SIGABRT (core dumped) +++
[pid  3002] +++ killed by SIGABRT (core dumped) +++
+++ killed by SIGABRT (core dumped) +++
zsh: abort (core dumped)  strace -ff -e openat ccls -index=/home/gicmo/Code/src/bolt

[Riatre]

From Getting started

You may use -DSYSTEM_CLANG=on if you have clang and llvm installed somewhere (can be a releases.llvm.org prebuilt archive, not necessarily installed via the system package manager). But caution is that you need to identify whether the clang library is compiled with -DLLVM_ENABLE_RTTI=on

[gicmo]

Ups. Sorry, should have read that more carefully. Using cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -BRelWithDebInfo -DCMAKE_INSTALL_PREFIX=/usr -DSYSTEM_CLANG=On -DUSE_SHARED_LLVM=On -DLLVM_ENABLE_RTTI=On -GNinja .. fixed it.

[MaskRay]

Can you delete #0 #1 ... from the stack trace? It confuses github as it thinks this issue references #0 #1 ...

[gicmo]

Done. Sorry about the spam.