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Diffstat (limited to 'doc/manual/rl-next/stack-traces.md')
| -rw-r--r-- | doc/manual/rl-next/stack-traces.md | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/doc/manual/rl-next/stack-traces.md b/doc/manual/rl-next/stack-traces.md new file mode 100644 index 000000000..e16d6c886 --- /dev/null +++ b/doc/manual/rl-next/stack-traces.md @@ -0,0 +1,26 @@ +--- +synopsis: "Some Lix crashes now produce reporting instructions and a stack trace, then abort" +cls: [1854] +category: Improvements +credits: jade +--- + +Lix, being a C++ program, can crash in a few kinds of ways. +It can obviously do a memory access violation, which will generate a core dump and thus be relatively debuggable. +But, worse, it could throw an unhandled exception, and, in the past, we would just show the message but not where it comes from, in spite of this always being a bug, since we expect all such errors to be translated to a Lix specific error. +Now the latter kind of bug should print reporting instructions, a rudimentary stack trace and (depending on system configuration) generate a core dump. + +Sample output: + +``` +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: test exception +Stack trace: + 0# nix::printStackTrace() in /home/jade/lix/lix3/build/src/nix/../libutil/liblixutil.so + 1# 0x000073C9862331F2 in /home/jade/lix/lix3/build/src/nix/../libmain/liblixmain.so + 2# 0x000073C985F2E21A in /nix/store/p44qan69linp3ii0xrviypsw2j4qdcp2-gcc-13.2.0-lib/lib/libstdc++.so.6 + 3# 0x000073C985F2E285 in /nix/store/p44qan69linp3ii0xrviypsw2j4qdcp2-gcc-13.2.0-lib/lib/libstdc++.so.6 + 4# nix::handleExceptions(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::function<void ()>) in /home/jade/lix/lix3/build/src/nix/../libmain/liblixmain.so + ... +``` |