Issues

• Number.prototype.toString(radix) output does not round-trip for radices that are not powers of two

  meta/hermes#2296 · Filter by author trackoor opened on Nov 5, 2026

• Assignment to a const binding is a compile-time error even when the assignment never runs (static_h)

  meta/hermes#2295 · Filter by author trackoor opened on Nov 5, 2026
  1

• Object.freeze/Object.seal on a Proxy only call preventExtensions; the target stays writable, yet Object.isFrozen(proxy) is true

  meta/hermes#2293 · Filter by author trackoor opened on Nov 5, 2026

• build.yml's macos job passes CMake a stray \ argument from RELEASE_FLAGS

  meta/hermes#2292 · Filter by author YevheniiKotyrlo opened on Nov 5, 2026

• build-apple-framework.sh with no arguments fails on a fresh checkout: XROS_DEPLOYMENT_TARGET makes clang build the host hermesc for visionOS

  meta/hermes#2290 · Filter by author YevheniiKotyrlo opened on Nov 5, 2026

• An Android build configured as doc/CrossCompilation.md describes fails on hermes.cpp's <fbjni/fbjni.h>

  meta/hermes#2285 · Filter by author YevheniiKotyrlo opened on Nov 4, 2026

• static_h does not build on Windows with Ninja: Node-API test addons with the same name write the same import library

  meta/hermes#2284 · Filter by author YevheniiKotyrlo opened on Nov 4, 2026

• The ES2024 RegExp v flag is a SyntaxError, so a bundle that imports query-string 10 does not load

  meta/hermes#2283 · Filter by author YevheniiKotyrlo opened on Nov 4, 2026
  1

• NAPI: hermes_napi_load_module can run another addon's init through lastRegisteredModule

  meta/hermes#2280 · Filter by author kraenhansen opened on Nov 1, 2026

• llvh's demangler does not compile against libc++ 23: std::terminate without <exception>, and std::is_pod

  meta/hermes#2278 · Filter by author YevheniiKotyrlo opened on Oct 30, 2026
  1

• iOS: Intl.DateTimeFormat drops the nu (numbering system) Unicode extension, so ar-SA-u-nu-latn formats with Arabic-Indic digits

  meta/hermes#2274 · Filter by author dalwadani opened on Oct 26, 2026

• iOS: Intl.NumberFormat unit style renders day without plural (2 day instead of 2 days), like every unit with no NSUnit counterpart

  meta/hermes#2272 · Filter by author MoogyG opened on Oct 26, 2026

• hermes-compiler npm package: publish per-platform binaries as optional packages (~40 MB unused per install)

  meta/hermes#2271 · Filter by author gre-ledger opened on Oct 26, 2026

• iOS: Intl.DateTimeFormat with hour components renders hourCycle: 'h12' as h11 in ja-JP (午前0:05 instead of 午前12:05)

  meta/hermes#2266 · Filter by author MoogyG opened on Oct 23, 2026

• Async arrow function with a destructuring rest parameter fails: "invalid destructuring target"

  meta/hermes#2260 · Filter by author NathanColosimo opened on Oct 21, 2026
  1

• JSI JSON parsing from ASCII and UTF-16 buffers

  meta/hermes#2258 · Filter by author mrousavy opened on Oct 21, 2026

• Shermes typed mode issue: 'super' keyword uses wrong type when used in static class methods

  bug
  meta/hermes#2252 · Filter by author of-moons-birds-and-monsters opened on Oct 17, 2026
  1

• Shermes typed mode bug: Incorrect 'this' used when attempting to access class members from static methods

  bug
  meta/hermes#2250 · Filter by author of-moons-birds-and-monsters opened on Oct 16, 2026

• High iOS Debug memory: lazy CodeBlock caches retain ~314 MiB and heap snapshots omit private-name cache storage

  meta/hermes#2241 · Filter by author vasanth-svg opened on Oct 12, 2026
  2

• regex fails to match line separator followed by newline

  bug
  meta/hermes#2235 · Filter by author robertmorelli opened on Oct 12, 2026

• regex lazy repetition throws stack depth error on a short input

  bug
  meta/hermes#2234 · Filter by author robertmorelli opened on Oct 12, 2026

• regex lookbehind with anchored alternative fails to match

  bug
  meta/hermes#2233 · Filter by author robertmorelli opened on Oct 12, 2026
  1

• regex nested counted repetition fails to match

  meta/hermes#2232 · Filter by author robertmorelli opened on Oct 12, 2026

• iOS: fast HV32 option (contiguous heap via extended-virtual-addressing) for memory-bound apps

  meta/hermes#2231 · Filter by author Zerovers1 opened on Oct 11, 2026
  1

• Proposal: write JS strings in place from native code (IAsciiStringWriter / IUtf16StringWriter)

  meta/hermes#2227 · Filter by author pioner92 opened on Oct 9, 2026
  1