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Nix Package Manager development

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For people hacking on Nix: https://github.com/NixOS/nix Nix maintainers can be reached here.184 Servers

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10 Oct 2025
@fzakaria:one.ems.hostfzakariamaybe those are normal ? I thought fuzzing is only looking for things that cause SIGSEGV00:22:39
@fzakaria:one.ems.hostfzakaria unless you set AFL_CRASH_EXITCODE='-1' 00:23:23
@fzakaria:one.ems.hostfzakaria(or something)00:23:27
@fzakaria:one.ems.hostfzakaria(or special catching for MSAN/ASAN)00:24:12
@fzakaria:one.ems.hostfzakaria

Note that in nearly all cases you can never reach full coverage. A lot of functionality is usually dependent on exclusive options that would need individual fuzzing campaigns each with one of these options set. E.g., if you fuzz a library to convert image formats and your target is the png to tiff API, then you will not touch any of the other library APIs and features.

00:25:11
@lovesegfault:matrix.orglovesegfaultyeah. i've seen coverage go up to ~35% so maybe it's good?00:26:02
@lovesegfault:matrix.orglovesegfaulthonggfuzz seemed to do better, maybe I should rescue that work00:26:17
@lovesegfault:matrix.orglovesegfaultI had another branch that used honggfuzz instead of afl++00:26:30
@lovesegfault:matrix.orglovesegfaultthe UI was much nicer00:26:34
@fzakaria:one.ems.hostfzakariahmm01:40:55
@fzakaria:one.ems.hostfzakaria¯\_(ツ)_/¯ don't know enough to comment on which is better01:41:04
@fzakaria:one.ems.hostfzakariaI see LLVM also has one included01:41:08
@lovesegfault:matrix.orglovesegfaultAnother little bit of the curl-s3 work is up: https://github.com/NixOS/nix/pull/1420614:56:17
@Ericson2314:matrix.orgJohn Ericson Sergei Zimmerman (xokdvium): would inline in a top-level function definition affect linking? 16:38:40
@Ericson2314:matrix.orgJohn Ericson I am having some trouble with missing from_json and to_json deps 16:39:00
@Ericson2314:matrix.orgJohn Ericson * I am having some trouble with missing from_json and to_json methods, from the macro nlohman provides 16:39:11
@Ericson2314:matrix.orgJohn Ericsonafter moving things around16:39:13

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