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@cwt cwt released this 30 Oct 09:22
· 12 commits to main since this release
v0.11.0
1603708

szn v0.11.0

84 commits since v0.10.0. 1,082 tests passing on both Zig 0.16.0 and Zig 0.17.0.

Headline: Dual Zig 0.16/0.17 Toolchain Support, Lifecycle Memory Reclamation (#542), Lao Script Reflow, Linux Packaging, and 61-Bug Stability Sweep

v0.11.0 is a major stabilization and portability release. It establishes verified dual-compiler support across both Zig 0.16.0 and Zig 0.17.0 from a unified source tree, overhauls session and pane memory lifecycles to eliminate unbounded arena accumulation (#542), expands advanced text reflow and cluster integrity to Lao script, introduces native Linux RPM packaging (Fedora / EL), modernizes the benchmarking suite, and resolves 61 bug tracker entries (#502–#562) spanning terminal emulation fidelity, alt-screen transitions, sixel graphics containment, and SafeAllocator memory safety.

Key Improvements & Features

1. Dual Zig 0.16.0 & 0.17.0 Toolchain Support

  • Single Source Tree Compatibility: The entire codebase compiles and passes its full 1,082-test suite cleanly under both Zig 0.16.0 and Zig 0.17.0.
  • Unified Standard Library Subset: Standardized on APIs present in both toolchains (bufPrintSentinel, fieldNames, mem.zeroes, .empty) and confined release-specific shims strictly to src/compat.zig and build.zig.
  • SafeAllocator Hardening (Bug #562): Resolved subtle test use-after-free hazards that were exposed when Zig 0.17 transitioned std.testing.allocator from DebugAllocator to the unmapping SafeAllocator.

2. Lifecycle Memory Architecture Overhaul (Bug #542)

  • Elimination of Vestigial Session Arena: Removed unbounded non-LIFO arena allocation in Session and cmd/ dispatch.
  • Dynamic Allocation Reclamation: Routed format expansions, option strings, and grid buffers through backing allocators with strict deallocation upon session and pane termination, preventing memory creeping during long-running sessions.
  • Atomic Concurrency & Descriptor Safety (Bugs #504, #510): Synchronized lazy libthai loading with atomic state transitions and made logging descriptor writes atomic.

3. Terminal Emulation Fidelity & VT Completeness (Bugs #523–#526, #546–#552)

  • String Terminator (ST) Compliance (#549): Implemented complete 7-bit (ESC \) and 8-bit (0x9C) ST termination handling across SOS, PM, APC, and OSC sequences.
  • PTY Keypad & Modifier Preservation (#551): Preserved extended keypad modes and modifiers in writeKeyToPty.
  • Modal Escape Handling (#552): Armed escape-time in modal views to ensure rapid, predictable Escape key dispatch.
  • Origin Mode & Navigation Fixes (#523–#526): Wired DECOM origin mode with saturating coordinate clamping, corrected NEL (0x85) column resets, and guarded CBT modulo calculations.
  • Alt-Screen State Preservation (#546, #550): Preserved scroll regions (DECSTBM) and saved main grid contents across alternate screen entries and exits.

4. Advanced Text Reflow, Thai & Lao Typography (Bugs #502–#505, #541, #559)

  • Lao Script Expansion: Extended syllable cluster integrity, zero-width mark attachment, and $O(1)$ backtrack reflow to Lao script (U+0EB0–U+0ECD), including Lao SARA AM (U+0EB3) diff repair and Yamakkan width metrics.
  • Compound Vowel Cluster Protection: Hardened Thai reflow boundaries around compound vowels (เ-าะ patterns) and spacing marks (ๆ, ฯ, ์).
  • Quote Protection Heuristics: Added boundary heuristics preventing dangling opening and closing quotes across pane reflows.

5. Packaging & Benchmarking Infrastructure

  • Native RPM & COPR Packaging: Added szn.spec, Copr build hooks, and multi-distro containerized build scripts (build_all.sh) for Fedora 44/45 and Enterprise Linux 9/10.
  • Hyperfine 2.0 Benchmarking & Report Extraction: Updated benchmark scripts for Hyperfine 2.0 shell syntax and extracted structured reporting into a typed, verified tool at tools/bench_report.py.

Testing & Quality Assurance

Metric v0.9.1 v0.10.0 v0.11.0
Total Passing Tests 970 1,032 1,082
New Regression Tests 11 62 50
Open Bugs in Tracker 0 0 0
Bugs Resolved in Cycle 1 (#440) 61 (#441–#501) 61 (#502–#562)
Binary Size (stripped, x86_64 Linux) ~831 KB ~831 KB 1,053,312 bytes (~1,029 KB)
Binary Size (stripped, aarch64 macOS) ~685 KB ~685 KB 834,864 bytes (~815 KB)
Build Status All passing All passing Clean under Zig 0.16.0 & 0.17.0
Assets 2
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