gistfile1.txt

[root@amd-nixos:~]# nix repl '<nixpkgs/nixos>'
Welcome to Nix version 2.3. Type :? for help.

Loading '<nixpkgs/nixos>'...
Added 6 variables.

nix-repl> config.boot.kernelModules
[ "pcspkr" "vboxdrv" "vboxnetadp" "vboxnetflt" "bridge" "macvlan" "tap" "tun" "ipv6" "zfs" "loop" "atkbd" "snd_pcm_oss" ]

nix-repl> config.boot
trace: Obsolete option `boot.binfmtMiscRegistrations' is used. It was renamed to `boot.binfmt.registrations'.
trace: Obsolete option `boot.bootMount' is used. It was renamed to `boot.loader.grub.bootDevice'.
trace: Obsolete option `boot.copyKernels' is used. It was renamed to `boot.loader.grub.copyKernels'.
trace: Obsolete option `boot.extraGrubEntries' is used. It was renamed to `boot.loader.grub.extraEntries'.
"menuentry \"Nixos Installer\" {\n  linux ($drive1)/rescue-kernel init=/nix/store/zadfjzfnczs8iccs6ps8vd5378589sd8-nixos-system-nixos--18.03pre-git/init loglevel=4\n  initrd ($drive1)/rescue-initrd\n}\n\nmenuentry \"Windows 7\" {\n  insmod part_msdos\n  insmod chain\n  set root=trace: Obsolete option `boot.extraGrubEntriesBeforeNixos' is used. It was renamed to `boot.loader.grub.extraEntriesBeforeNixOS'.
false; extraModprobeConfig = "options snd_hda_intel enable=1,0\ninstall dccp /run/current-system/sw/bin/false\n\n\noptions firmware_class path=/nix/store/hxfip44470w87vgz45j19s6vc4kgg4ib-firmware/lib/firmware"; extraModulePackages = [ ... ]; extraTTYs = [ ... ]; growPartition = trace: Obsolete option `boot.grubDevice' is used. It was renamed to `boot.loader.grub.device'.
trace: Obsolete option `boot.grubSplashImage' is used. It was renamed to `boot.loader.grub.splashImage'.
"/nix/store/n511a8yq2fp4113dizzm9xx1syx869m0-simple-dark-gray-bootloader-2018-08-28/share/artwork/gnome/nix-wallpaper-simple-dark-gray_bootloader.png"; hardwareScan = true; initrd = { ... }; isContainer = false; kernel = { ... }; kernelModules = [ ... ]; kernelPackages = { ... }; kernelParams = [ ... ]; kernelPatches = [ ... ]; loader = { ... }; plymouth = { ... }; postBootCommands = ""; resumeDevice = ""; runSize = "25%"; specialFileSystems = { ... }; supportedFilesystems = [ ... ]; systemd = { ... }; tmpOnTmpfs = false; vesa = false; zfs = { ... }; }

nix-repl> config.boot.kernelModules
Aborted (core dumped)

[root@amd-nixos:~]# coredumpctl gdb -1
(gdb) bt
#0  0x00007f9f91855be0 in raise () from /nix/store/6yaj6n8l925xxfbcd65gzqx3dz7idrnn-glibc-2.27/lib/libc.so.6
#1  0x00007f9f91856dc1 in abort () from /nix/store/6yaj6n8l925xxfbcd65gzqx3dz7idrnn-glibc-2.27/lib/libc.so.6
#2  0x00007f9f925334d3 in nix::showType[abi:cxx11](nix::Value const&) [clone .cold.796] () from /nix/store/igc3zwndrl6aa60y2rfbx1f98d7wrqnv-nix-2.3/lib/libnixexpr.so
#3  0x00007f9f925595d8 in nix::throwTypeError(char const*, nix::Value const&, nix::Pos const&) () from /nix/store/igc3zwndrl6aa60y2rfbx1f98d7wrqnv-nix-2.3/lib/libnixexpr.so
#4  0x00007f9f9255d49b in nix::ExprSelect::eval(nix::EvalState&, nix::Env&, nix::Value&) () from /nix/store/igc3zwndrl6aa60y2rfbx1f98d7wrqnv-nix-2.3/lib/libnixexpr.so
#5  0x00000000004e3fdb in nix::NixRepl::evalString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, nix::Value&) ()
#6  0x00000000004e6d20 in nix::NixRepl::processLine(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) ()
#7  0x00000000004e72a2 in nix::NixRepl::mainLoop(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) ()
#8  0x00000000004e8c1b in nix::CmdRepl::run(nix::ref<nix::Store>) ()
#9  0x00000000004b6b09 in nix::StoreCommand::run() ()
#10 0x00000000004d4b18 in nix::mainWrapped(int, char**) ()
#11 0x00007f9f9224909c in nix::handleExceptions(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::function<void ()>) () from /nix/store/igc3zwndrl6aa60y2rfbx1f98d7wrqnv-nix-2.3/lib/libnixmain.so
#12 0x0000000000441c9b in main ()

i can reproduce the fault under gdb, but not under valgrind