Issues

• Regression suite dies on fatal signals (SIGSEGV/SIGILL), mostly on macOS, at two GC-adjacent points

  clasp-developers/clasp#1837 · Filter by author dg1sbg opened on Aug 14, 2026

• No compare-and-swap on foreign memory: MP:CAS signals NOT-ATOMIC for every FFI accessor

  clasp-developers/clasp#1835 · Filter by author dg1sbg opened on Aug 12, 2026

• MP:CAS silently loses updates on the bytecode path: core:acas is not atomic

  clasp-developers/clasp#1834 · Filter by author dg1sbg opened on Aug 12, 2026

• Installed binaries keep loading libclasp from the build tree (rpath baked at link time)

  clasp-developers/clasp#1831 · Filter by author dg1sbg opened on Aug 4, 2026

• generate-lisp-info never regenerates: its dependency on libclasp reaches it only through an order-only edge

  clasp-developers/clasp#1828 · Filter by author dg1sbg opened on Aug 3, 2026

• ninja test exits 0 when tests fail to register: a broken test file silently removes its tests from the run

  clasp-developers/clasp#1824 · Filter by author dg1sbg opened on Aug 3, 2026

• SIGSEGV: :dx-call on REDUCE stack-allocates a closure a conforming SEQUENCE:REDUCE method retains

  clasp-developers/clasp#1819 · Filter by author dg1sbg opened on Aug 3, 2026

• prin1 prints some double-floats with too few digits to read back the same float

  clasp-developers/clasp#1816 · Filter by author dg1sbg opened on Aug 1, 2026
  1

• Flaky test: WEAK-KEY-AND-VALUE-WEAKNESS fails intermittently on ubuntu-latest/bytecode

  clasp-developers/clasp#1814 · Filter by author dg1sbg opened on Aug 1, 2026
  3

• EQL-specialized generic functions never memoize: every call is a full dispatch miss

  clasp-developers/clasp#1811 · Filter by author dg1sbg opened on Jul 31, 2026
  2

• Macro lambda lists do not accept dotted lists (again) & dotted lists with quasiquote

  bug
  clasp-developers/clasp#1808 · Filter by author Gleefre opened on Jul 30, 2026
  1

• gctools:deallocate-unmanaged-instance frees an interior pointer (corrupts Boehm heap) + leaks a debug printf

  clasp-developers/clasp#1793 · Filter by author dg1sbg opened on Jun 12, 2026

• Multithreaded printing occasionally causes array access out of bounds

  bug
  clasp-developers/clasp#1763 · Filter by author drmeister opened on Apr 18, 2026

• EXT::BUS-ERROR undefined function on startup (macOS arm64)

  bug
  clasp-developers/clasp#1749 · Filter by author SuChengHao opened on Mar 21, 2026

• Hunchentoot fails on Clasp 2.7.0: socket stream is not binary (usocket 0.8.8)

  bug
  clasp-developers/clasp#1744 · Filter by author logoraz opened on Mar 16, 2026

• What is the policy/attitude towards LLM contributions in Clasp?

  clasp-developers/clasp#1734 · Filter by author zyd-n opened on Mar 13, 2026
  1

• CLOS: Long instructions cause errors

  bug
  clasp-developers/clasp#1731 · Filter by author slburson opened on Feb 27, 2026
  1

• Compiling Coalton with CLASP (Windows WSL)

  bug
  clasp-developers/clasp#1729 · Filter by author hyperZphere opened on Feb 10, 2026

• Exotic weak hash table & loader problem

  bugliterals
  clasp-developers/clasp#1720 · Filter by author Bike opened on Dec 15, 2025

• clasp extension

  clasp-developers/clasp#1716 · Filter by author physarella opened on Dec 4, 2025
  3

• Default behavior when *print-pretty* is nil

  question
  clasp-developers/clasp#1713 · Filter by author aadcg opened on Nov 29, 2025
  7

• iclasp hangs up during building on FreeBSD

  bug
  clasp-developers/clasp#1711 · Filter by author shamazmazum opened on Nov 18, 2025
  1

• TYPEP misidentifies subclasses of SEQUENCE

  bug
  clasp-developers/clasp#1705 · Filter by author paulapatience opened on Oct 31, 2025
  1

• No error signaled when binding constants with PROGV

  bug
  clasp-developers/clasp#1701 · Filter by author paulapatience opened on Oct 10, 2025
  1

• defstruct :type vector restricts the vector length at high safety

  bug
  clasp-developers/clasp#1699 · Filter by author slburson opened on Sep 15, 2025