Issues

• emscripten_webgl_destroy_context_before_on_calling_thread is never invoked due to missing $ prefix check

  emscripten-core/emscripten#27891 · Filter by author sbc100 opened on Oct 6, 2026

• NODERAWSOCKETS: setsockopt(SO_RCVTIMEO/SO_SNDTIMEO) succeeds but getsockopt fails with ENOPROTOOPT

  emscripten-core/emscripten#27888 · Filter by author JosepMariaBlasco opened on Oct 6, 2026

• NODERAWSOCKETS: gethostbyname() still returns fake 172.29.x.y addresses that node:net cannot reach

  emscripten-core/emscripten#27887 · Filter by author JosepMariaBlasco opened on Oct 6, 2026

• PROXY_TO_PTHREAD: gethostbyname() maps names in the worker's DNS table, so connect() on the main thread uses the fake address

  emscripten-core/emscripten#27886 · Filter by author JosepMariaBlasco opened on Oct 6, 2026
  1

• WasmFS: ProxyWorker's 50 ms heartbeat outlives its thread and runs the freed queue on a pooled Worker (Assertion failed: pthread_self() in emscripten_proxy_execute_queue)

  emscripten-core/emscripten#27858 · Filter by author typedrat opened on Oct 2, 2026

• [WasmFS] Node backend can't open a write-only (0200) file for writing

  emscripten-core/emscripten#27847 · Filter by author typedrat opened on Oct 1, 2026

• dlopen() skips a running thread whose pthread_t was reused from a just-joined thread ("table index is out of bounds")

  emscripten-core/emscripten#27841 · Filter by author typedrat opened on Oct 1, 2026

• Threads that exit unjoined leak their stack and Worker while the main thread is blocked

  emscripten-core/emscripten#27840 · Filter by author typedrat opened on Oct 1, 2026

• Deprecation proposal for SCons support (emscons)

  deprecation
  emscripten-core/emscripten#27835 · Filter by author sbc100 opened on Oct 1, 2026
  

• WasmFS: mkdir()/open(O_CREAT) report EIO for any backend failure (e.g. EACCES from the Node backend)

  emscripten-core/emscripten#27832 · Filter by author typedrat opened on Oct 1, 2026

• Pipes are unbounded: a non-blocking writer never gets EAGAIN (and WasmFS runs out of memory)

  emscripten-core/emscripten#27831 · Filter by author typedrat opened on Oct 1, 2026

• dlsym(RTLD_NEXT, ...) aborts with "Tried to dlsym() from an unopened handle: -1" under MAIN_MODULE

  emscripten-core/emscripten#27830 · Filter by author typedrat opened on Oct 1, 2026
  2

• WasmFS: chdir() and path lookup ignore directory search (execute) permission

  emscripten-core/emscripten#27829 · Filter by author typedrat opened on Oct 1, 2026

• WasmFS: poll() does not report POLLIN for an empty regular file, /dev/null or /dev/random

  emscripten-core/emscripten#27828 · Filter by author typedrat opened on Oct 1, 2026

• WasmFS: open() with O_NOCTTY (or O_SYNC/O_DSYNC) aborts on the flag assertion in doOpen

  emscripten-core/emscripten#27826 · Filter by author typedrat opened on Oct 1, 2026

• WasmFS Node backend: host open() errors are used as file descriptors, and close() errors are returned with the wrong sign

  emscripten-core/emscripten#27825 · Filter by author typedrat opened on Oct 1, 2026

• WasmFS Node backend: after rename(), a file (or anything already looked up under a renamed directory) still refers to its old host path

  emscripten-core/emscripten#27824 · Filter by author typedrat opened on Oct 1, 2026

• WasmFS Node backend: chmod() and utimensat() only change WasmFS's in-memory metadata, not the host file

  emscripten-core/emscripten#27823 · Filter by author typedrat opened on Oct 1, 2026

• WasmFS Node backend: fsync() aborts with "TODO: implement NodeFile::flush"

  emscripten-core/emscripten#27822 · Filter by author typedrat opened on Oct 1, 2026

• Directly activate a WebGL context from JS

  emscripten-core/emscripten#27776 · Filter by author matzf opened on Sep 24, 2026

• [FEATURE REQUEST] __int128 emulation support

  emscripten-core/emscripten#27754 · Filter by author yosmo78 opened on Sep 21, 2026
  2

• Closure JSC_WRONG_ARGUMENT_COUNT against the FS runtime with -sEXPORT_ES6 on 6.0.x (fatal under -Wall -Werror)

  emscripten-core/emscripten#27747 · Filter by author Fedr opened on Sep 18, 2026

• clang version string contains malformed repo URL https:/github.com

  emscripten-core/emscripten#27745 · Filter by author simonw opened on Sep 18, 2026
  5

• Path logic broken with NODERAWFS on Windows

  emscripten-core/emscripten#27744 · Filter by author stevenwdv opened on Sep 18, 2026
  8

• No supported way to negate -pthread: USE_PTHREADS is deprecated but is the only working off-switch

  emscripten-core/emscripten#27723 · Filter by author zommuter opened on Sep 16, 2026
  4