Jade Lovelace
5687881a1f
This is because C++ exceptions are very tricky, and most notably,
because a catch is run *after* things have been cleaned up, and we don't
*want* them cleaned up if we want usable stack traces.
$ nix nar
Lix crashed. This is a bug. We would appreciate if you report it along with what caused it at https://git.lix.systems/lix-project/lix/issues with the following information included:
Exception: std::runtime_error: lol
Stack trace:
0# nix::getStackTrace[abi:cxx11]() in /home/jade/lix/lix4/outputs/out/lib/liblixutil.so
1# 0x00007D58FC909292 in /home/jade/lix/lix4/outputs/out/lib/liblixmain.so
2# 0x00007D58FC49220A in /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
3# 0x00007D58FC492275 in /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
4# 0x00007D58FC4924C7 in /nix/store/ybjcla5bhj8g1y84998pn4a2drfxybkv-gcc-13.3.0-lib/lib/libstdc++.so.6
5# 0x00005B9799B45036 in nix
6# 0x00005B9799B3697F in nix
7# 0x00005B9799B3924D in nix
8# nix::handleExceptions(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::function<void ()>) in /home/jade/lix/lix4/outputs/out/lib/liblixmain.so
9# 0x00005B9799B38D2B in nix
10# 0x00007D58FC1E227E in /nix/store/wn7v2vhyyyi6clcyn0s9ixvl7d4d87ic-glibc-2.40-36/lib/libc.so.6
11# __libc_start_main in /nix/store/wn7v2vhyyyi6clcyn0s9ixvl7d4d87ic-glibc-2.40-36/lib/libc.so.6
12# 0x00005B9799A7CF05 in nix
zsh: IOT instruction (core dumped) nix nar
Sadly our symbolizer sucks. But that's, well, improvable. The core dump
is at least much more useful now.
Obviously with async things being full of catch-alls, we have the same
problem. I think we might want to change those in another commit to only
catch nix::BaseError subclasses and let the rest fall into a noexcept
function so it will crash hard.
The daemon also could use this treatment, but I would like to be able to
send the client the crash message in phase 1 unwind. No idea how to
achieve that; all the ways I have seen are heinous.
Fixes: https://git.lix.systems/lix-project/lix/issues/698
Change-Id: I0b61f2e7a7003b92c39b1a0e90756979e5e59cb4
Lix
Lix is an implementation of Nix, a powerful package management system for Linux and other Unix systems that makes package management reliable and reproducible.
Read more about us at https://lix.systems.
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On Linux and macOS the easiest way to install Lix is to run the following shell command (as a user other than root):
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See our Hacking guide in our manual for instruction on how to to set up a development environment and build Lix from source.
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