printAmbiguous (used by nix-instantiate --eval and nix-env) had a depth parameter, but all callers passed INT_MAX, effectively disabling the limit. The function relied on the C++ stack to eventually overflow, which could cause uncontrolled SIGSEGV crashes on deeply nested pre-forced structures. Now printAmbiguous checks depth against max-call-depth (default 10000) and throws StackOverflowError with a proper trace, consistent with other recursive value traversal functions. The function signature is updated to take EvalState& to access the settings and throw proper errors. The depth parameter now counts up from 0 instead of down from INT_MAX.
Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
Installation and first steps
Visit nix.dev for installation instructions and beginner tutorials.
Full reference documentation can be found in the Nix manual.
Building and developing
Follow instructions in the Nix reference manual to set up a development environment and build Nix from source.
Contributing
Check the contributing guide if you want to get involved with developing Nix.
Additional resources
Nix was created by Eelco Dolstra and developed as the subject of his PhD thesis The Purely Functional Software Deployment Model, published 2006. Today, a world-wide developer community contributes to Nix and the ecosystem that has grown around it.
- The Nix, Nixpkgs, NixOS Community on nixos.org
- Official documentation on nix.dev
- Nixpkgs is the largest, most up-to-date free software repository in the world
- NixOS is a Linux distribution that can be configured fully declaratively
- Discourse
- Matrix: #users:nixos.org for user support and #nix-dev:nixos.org for development
License
Nix is released under the LGPL v2.1.