Issues

• Bug: Cannot build SOCI (static, SQLite3 only) – libc++ aligned_storage / aligned_union breakage

  low severity
  jart/cosmopolitan#1526 · Filter by author baziorek opened on Sep 23, 2026

• Bug: Crash after forked child exits

  high severity
  jart/cosmopolitan#1524 · Filter by author haael opened on Sep 12, 2026
  3

• Windows: cosmocc cc1 blocks indefinitely (~0% CPU) on large C translation units, intermittently, at -O0

  jart/cosmopolitan#1522 · Filter by author farkasmark opened on Sep 9, 2026

• Windows: APE exit status is shifted left by 8 (exit code does not round-trip; failures read as success in POSIX shells)

  jart/cosmopolitan#1521 · Filter by author farkasmark opened on Sep 9, 2026
  1

• Bug: redbean.dev is unaccessible due to Expired Cert

  high severity
  jart/cosmopolitan#1517 · Filter by author bmacho opened on Aug 26, 2026
  3

• Global macros naming conflicts

  jart/cosmopolitan#1516 · Filter by author vadimkantorov opened on Aug 23, 2026
  1

• Graft native-compiler output into a pinned APE header template

  jart/cosmopolitan#1512 · Filter by author AMDphreak opened on Aug 18, 2026

• Bug: HTTPS cert broken on website.

  medium severity
  jart/cosmopolitan#1504 · Filter by author tian2992 opened on Jun 9, 2026
  6

• ReadMe still claims compatibility with Windows 8.x

  jart/cosmopolitan#1503 · Filter by author cher-nov opened on May 28, 2026

• Bug: pledge doesn't unveil nsswitch.conf

  medium severity
  jart/cosmopolitan#1499 · Filter by author amrfti opened on May 22, 2026

• Bug: a440 example is not compilable with cosmocc

  low severity
  jart/cosmopolitan#1495 · Filter by author kapstok opened on Apr 25, 2026
  5

• error: this ape binary only supports x86_64

  jart/cosmopolitan#1493 · Filter by author mingodad opened on Mar 30, 2026
  2

• Bug: redbean crash on some files

  critical severity
  jart/cosmopolitan#1481 · Filter by author mutr opened on Feb 23, 2026

• Feature Request: GetZipPaths to take in account overlay

  jart/cosmopolitan#1479 · Filter by author mingodad opened on Feb 17, 2026

• Regression: Segfault on Linux x86_64 with cosmo_dlopen when calling foreign function

  critical severity
  jart/cosmopolitan#1478 · Filter by author HeavenVolkoff opened on Feb 11, 2026
  1

• Bug: wait with no timeout with XNU times out after 72 minutes

  medium severity
  jart/cosmopolitan#1475 · Filter by author aittalam opened on Feb 6, 2026

• Bug: Cosmopolitan Python's sys.platform always returns 'linux'

  low severity
  jart/cosmopolitan#1462 · Filter by author yjfvictor opened on Dec 30, 2025

• Bug (with patch): redbean SIGSEGV when https certificates given on CLI (-C, -K)

  medium severity
  jart/cosmopolitan#1458 · Filter by author exquisitus opened on Dec 19, 2025

• Redbean: string multiply operator considered harmful

  jart/cosmopolitan#1456 · Filter by author bjornbm opened on Dec 15, 2025

• Bug: ioctl for terminal settings not working as expected on Windows

  medium severity
  jart/cosmopolitan#1453 · Filter by author tobybear opened on Nov 19, 2025

• Feature Request: redbean auto-search for an available port if no port is provided.

  jart/cosmopolitan#1450 · Filter by author pendashteh opened on Nov 15, 2025

• Potential undefined behavior in udiv128by64to64default() due to __builtin_clzll(0) (related to GCC Bug 101175)

  jart/cosmopolitan#1448 · Filter by author lyican11 opened on Nov 11, 2025

• Feature Request: armv8l support

  jart/cosmopolitan#1447 · Filter by author dereference23 opened on Nov 10, 2025
  5

• Bug: third_party/nsync/mu_semaphore_futex.c:72: unassert(futex_result == 0

  medium severity
  jart/cosmopolitan#1446 · Filter by author mingodad opened on Oct 23, 2025

• Bug: -pg not working

  medium severity
  jart/cosmopolitan#1445 · Filter by author BradHutchings opened on Oct 5, 2025