facebook/folly

An open-source C++ library developed and used at Facebook.

Stars: 30.5k
Forks: 5.9k
Open beginner issues: 0
Indexed issues: 326

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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326 open issues indexed

Build failure with Python 3.13 Open

facebook/folly#2358 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Build debug version failed on windows, compiler is msvc(vs2022) v143 Open

facebook/folly#2362 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"io_async_async_udp_socket_test.AsyncSocketIntegrationTest" tests crash intermittently Open

facebook/folly#2364 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"executors_serial_executor_test.SerialExecutorTest" tests crash intermittently Open

facebook/folly#2365 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"io_async_notification_queue_test.NotificationQueueTest.UseAfterFork" test crashes intermittently Open

facebook/folly#2366 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Facebook Open

facebook/folly#2369 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
mmap set offset = 4096 will fail Open

facebook/folly#2374 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
This code seems to violate strict aliasing rule Open

facebook/folly#2381 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[MSVC] A large number of tests failed after building with Address Sanitizers Open

facebook/folly#2382 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Compile error in folly\test\ExpectedCoroutinesTest.cpp when compiling with /std:c++20 or later Open

facebook/folly#2383 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[BUG]: EpollBackend.h: error: type struct EpollBackend violates the C++ One Definition Rule [-Werror=odr] Open

facebook/folly#2387 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
k_limit does not increase in the second time in merging multiple digests Open

facebook/folly#2388 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Inefficient memory order in SpinLock Open

facebook/folly#2389 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Compiling with MSVC 2022 yields: libiberty.a(cp-demangle.o) : error LNK2019 Open

facebook/folly#2399 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Does not build on fedora 41 Open

facebook/folly#2401 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[MSVC] Warning C4146 from compiler about implementation of VectorContainerPolicy::valuesOffset Open

facebook/folly#2406 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Question] Would the maintainers like to be added to libc++'s special vendor communications? Open

facebook/folly#2411 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
error: there are no arguments to ‘occupiedMask’ that depend on a template parameter, so a declaration of ‘occupiedMask’ must be available Open

facebook/folly#2416 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
How to Implement Key-Value Storage Using `folly::ConcurrentSkipList`? Open

facebook/folly#2417 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`IoUringZeroCopyBufferPool` depends on unreleased liburing features Open

facebook/folly#2420 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Coroutine tests fail with GCC 15 Open

facebook/folly#2422 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
dynamic.h operator== claiming to do a deep equal comparison but its not Open

facebook/folly#2424 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Build error: Policy CMP0167 is not set: The FindBoost module is removed. Open

facebook/folly#2427 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ERROR: something wrong with flag 'folly_hazptr_use_executor' in file 'Hazptr.cpp'. One possibility: file 'Hazptr.cpp' is being linked both statically and dynamically into this executable. Open

facebook/folly#2428 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
DynamicTokenBucket::consumeWithBorrowNonBlocking will return incorrect value with very low rate Open

facebook/folly#2430 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Move from glog to ng-log Open

facebook/folly#2442 · 0 comments · 4 reactions · 0 assignees · Indexed Sep 15, 2026
symbolizer::findDefinitionDie returns incorrect DW_AT_specification offset for DW_FORM_ref_addr Open

facebook/folly#2445 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
gen_parallel_benchmark hangs. Open

facebook/folly#2450 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
container_fbvector_benchmark - looks like its looped Open

facebook/folly#2451 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Inconsistent ordering in AtFork's prepare() rollback vs parent() execution Open

facebook/folly#2452 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Can I use atomic_shared_ptr on a 5-level paging enabled system? Open

facebook/folly#2460 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
folly/coro/Coroutine.h file not found after upgrading to 0.80.1 Open

facebook/folly#2467 · 5 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
non-type template argument is not a constant expression Open

facebook/folly#2472 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
perf issue try to use folly coroutine reactor to process sqe latency is way long if handle 50K requests Open

facebook/folly#2473 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Double free error when mixing c++20 project with folly built using c++17 Open

facebook/folly#2477 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
IoUringZeroCopyBufferPool.cpp:34:21: error: 'sysconf' was not declared in this scope Open

facebook/folly#2478 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unable to find the ”ManyFind benchmark“ in folly Open

facebook/folly#2481 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Folly build failure auto& asyncFrame = continuation.promise().getAsyncFrame() Open

facebook/folly#2492 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Build failure with GCC 14 on riscv64 (Ubuntu 24.04) due to use of libstdc++ internal details Open

facebook/folly#2493 · 6 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Error with macros when building folly Open

facebook/folly#2494 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
project link folly with " in function `folly::MicroSpinLock::lock()': /usr/local/include/folly/synchronization/SanitizeThread.h:74: undefined reference to `folly::detail::annotate_rwlock_acquired_v'" Open

facebook/folly#2498 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Windows CI build is broken Open

facebook/folly#2500 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Build fails: error: comparison between pointer and integer ('ElfAddr' (aka 'unsigned long') and 'caddr_t' (aka 'char *')) Open

facebook/folly#2502 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
2025.10.06 FTBFS on gcc-i586: call of overloaded 'find(const std::basic_string_view<char>&)' Open

facebook/folly#2515 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
2025.10.06 FTBFS on clang-x86_64: reference to overloaded function could not be resolved Open

facebook/folly#2516 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
2025.10.06 FTBFS on clang-i586: static assertion failed due to requirement 'alignof...' Open

facebook/folly#2517 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
CPUThreadPoolExecutor::threadRun crash Open

facebook/folly#2525 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
v2025.04.28.00 build fail on mac m4 15.7.1 Open

facebook/folly#2530 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[MSVC] C:\gitP\facebook\folly\folly\test\MemsetBenchmark.cpp(38): error C3861: '__builtin_clzl': identifier not found Open

facebook/folly#2533 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
MSVC compile error safe_closure Open

facebook/folly#2536 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

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