Robert Hensing 3bef494271 fix: Add mutex to nix_util::settings to prevent concurrent access segfault ... Fixes #106 The Nix settings system uses global mutable state without internal synchronization. When multiple threads call settings::set concurrently (as happens in parallel test execution), this causes a segfault in the C++ std::set implementation. Changes: - Add mutex to serialize access through the Rust API - Add documentation explaining thread safety limitations - Add Once guard in nix-flake tests to minimize concurrent access The mutex provides protection between Rust callers, though it cannot completely prevent C++ Nix code from modifying settings concurrently. (cherry picked from commit 203917657b60c4e1dcbaf442bec64c37c634abc4)		2025-10-04 02:31:16 +02:00
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src	fix: Add mutex to nix_util::settings to prevent concurrent access segfault	2025-10-04 02:31:16 +02:00
Cargo.toml	maint: Remove Cargo.toml patch constraints	2025-10-04 02:31:16 +02:00