Nix wrote half of my debugger

Re:Nix wrote half of my debugger by Cyph0n on Saturday October 10, 2026 @04:02PM (#50036597)

Dude, this is amazing stuff. Farid really is putting out banger after Nix banger haha. This sounds like a mini/less capable Antithesis runtime, but running on your machine.

Curious: how does Rewind deal with randomness?

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Re:Nix wrote half of my debugger by setheron on Saturday October 10, 2026 @10:52PM (#50039384)

The kernel's RNG is seeded from a seed passed at boot.

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Re:Nix wrote half of my debugger by Cyph0n on Monday October 12, 2026 @03:26PM (#50061617)

As far as I can tell, that is only one piece of the puzzle. I think the bulk of the work is on the hypervisor side (KVM) to eliminate/stub out sources of randomness in HW, patch out RDRAND, etc

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Re:Nix wrote half of my debugger by iwixon on Sunday October 11, 2026 @12:07AM (#50039716)

I had the exact same thought about Antithesis while reading this. I wonder if this could be used for concurrency bug hunting by setting up preconditions and grinding until failure to capture a bug you’re looking for.

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