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ddf7156bab [3.14] gh-159739: Skip context watchers cleared during notification (GH-160164) (#160289 )

A context watcher callback can clear a later watcher while a context-switch notification is being dispatched. The dispatcher still uses its earlier snapshot of active watchers, so it calls a NULL callback and crashes; check that each callback is still registered before invoking it. Backport to 3.15 and 3.14.
(cherry picked from commit 0a5762621f)

Co-authored-by: Jelle Zijlstra <[email protected]>

2026-10-22 15:20:56 -07:00

clinic

[3.14] gh-155952: Fix <unrepresentable> Argument Clinic defaults in several signatures (#156172 )

2026-08-21 13:23:30 +01:00

frozen_modules

…

_contextvars.c

gh-128384: Use a context variable for warnings.catch_warnings (gh-130010)

2025-04-09 16:18:54 -07:00

_warnings.c

[3.14] gh-159739: Fix reference and error handling in warnings (GH-159758) (#160085 )

2026-10-21 19:24:15 +00:00

asdl.c

…

asm_trampoline_aarch64.h

[3.14] gh-139808: Add branch protections for aarch64 in asm_trampoline.S (#130864 ) (#150189 )

2026-05-21 18:41:26 +02:00

asm_trampoline.S

[3.14] gh-139808: Add branch protections for aarch64 in asm_trampoline.S (#130864 ) (#150189 )

2026-05-21 18:41:26 +02:00

assemble.c

[3.14] gh-151112: Fix double free in assemble_init when out of memory (GH-151142) (#151206 )

2026-06-09 21:13:45 +01:00

ast_preprocess.c

[3.14] gh-131927: Do not emit PEP 765 warnings in ast.parse() (GH-139642) (GH-140786)

2025-10-30 11:25:34 +00:00

ast_unparse.c

[3.14] gh-132661: Disallow Template/str concatenation after PEP 750 spec update (#135996 ) (#136901 )

2025-07-21 17:34:54 +02:00

ast.c

[3.14] gh-85260: Extend the AST Validator to validate all identifiers (GH-21069) (GH-155651)

2026-08-13 05:58:06 +00:00

bltinmodule.c

[3.14] gh-150285: Fix too long docstrings in builtins (GH-150293) (GH-150466)

2026-05-26 10:05:49 +00:00

bootstrap_hash.c

GH-131238: Core header refactor (GH-131250)

2025-03-17 09:19:04 +00:00

brc.c

[3.14] gh-157838: Merge biased refcounts on behalf of detached threads (#157839 ) (#158012 )

2026-09-29 08:22:24 +05:30

bytecodes.c

[3.14] gh-154902: Type-check the SET_ADD operand (#155072 )

2026-08-05 07:24:50 -07:00

ceval_gil.c

[3.14] GH-133136: Revise QSBR to reduce excess memory held (gh-135473) (#135912 )

2025-07-08 10:58:01 -07:00

ceval_macros.h

[3.14] gh-129752: Don't update adaptive counters when TLBC=0 in free-threading. (gh-155497) (gh-155715)

2026-08-13 15:20:04 +00:00

ceval.c

[3.14] gh-159320: Enable stack size detection on Android (GH-159321) (#159410 )

2026-10-14 12:44:00 +00:00

codecs.c

[3.14] gh-159739: Bound encoding-name lookahead in surrogatepass (GH-159785) (#159912 )

2026-10-20 18:38:32 +00:00

codegen.c

[3.14] gh-156091: Fix crash compiling deeply nested inlined comprehensions (GH-156957) (#156993 )

2026-09-05 16:27:05 +00:00

compile.c

[3.14] gh-156466: Fix additional compiler scope cleanup errors (GH-156547) (#156572 )

2026-08-29 12:42:26 +00:00

condvar.h

gh-104530: Enable native Win32 condition variables by default (GH-104531)

2024-02-02 13:50:51 +00:00

config_common.h

gh-76785: Add PyInterpreterConfig Helpers (gh-117170)

2024-04-02 20:35:52 +00:00

context.c

[3.14] gh-159739: Skip context watchers cleared during notification (GH-160164) (#160289 )

2026-10-22 15:20:56 -07:00

critical_section.c

[3.14] gh-150902: Optimize PyCriticalSection2 to skip locking the same locks held by the current CS2 (gh-151555)

2026-06-19 09:51:55 -04:00

crossinterp_data_lookup.h

[3.14] gh-146615: Fix format specifiers in Python/ directory (GH-146619) (GH-146650)

2026-03-31 08:25:07 +00:00

crossinterp_exceptions.h

[3.14] gh-132775: Clean Up Cross-Interpreter Error Handling (gh-135492)

2025-06-14 02:08:25 +00:00

crossinterp.c

[3.14] gh-151842: Fix crash upon OOM in _interpreters.capture_exception (GH-151843) (GH-152032)

2026-06-23 20:57:34 +00:00

dtoa.c

[3.14] gh-158446: Reject float format precision near INT_MAX (GH-158474) (#158477 )

2026-09-30 08:36:53 +00:00

dup2.c

gh-108765: Python.h no longer includes <unistd.h> (#108783 )

2023-09-02 16:50:18 +02:00

dynamic_annotations.c

…

dynload_hpux.c

gh-88402: Add new sysconfig variables on Windows (GH-110049)

2023-10-04 22:50:29 +00:00

dynload_shlib.c

gh-131238: Remove more includes from pycore_interp.h (#131480 )

2025-03-19 23:01:32 +01:00

dynload_stub.c

gh-88402: Add new sysconfig variables on Windows (GH-110049)

2023-10-04 22:50:29 +00:00

dynload_win.c

gh-131238: Remove pycore_runtime.h from pycore_pystate.h (#131356 )

2025-03-19 17:33:24 +01:00

emscripten_signal.c

GH-108614: Unbreak emscripten build (GH-109132)

2023-09-08 17:54:45 +01:00

emscripten_syscalls.c

[3.14] gh-124621: Emscripten: Support pyrepl in browser (GH-136931) (GH-136988)

2025-07-22 15:04:11 +02:00

emscripten_trampoline_inner.c

[3.14] gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten trampoline (GH-137470) (#139039 )

2025-09-17 17:21:01 +01:00

emscripten_trampoline.c

[3.14] gh-145037: Fix Emscripten trampoline with emcc >= 4.0.19 (GH-145038) (#145283 )

2026-02-27 08:55:59 +08:00

errors.c

[3.14] gh-158893: Make os.strerror() thread-safe (#159120 ) (#159145 )

2026-10-10 20:54:38 +00:00

executor_cases.c.h

[3.14] gh-154902: Type-check the SET_ADD operand (#155072 )

2026-08-05 07:24:50 -07:00

fileutils.c

[3.14] gh-158893: Make os.strerror() thread-safe (#159120 ) (#159145 )

2026-10-10 20:54:38 +00:00

flowgraph.c

[3.14] gh-148817: Fold long lists/sets of constant elements into constant tu… (#155898 )

2026-08-16 17:16:24 +03:00

formatter_unicode.c

[3.14] gh-159739: Check character formatting allocation failure (GH-159746) (#159840 )

2026-10-20 08:45:25 -07:00

frame.c

[3.14] gh-144446: Fix some frame object thread-safety issues (gh-144479) (#144546 )

2026-02-06 15:25:36 +00:00

frozen.c

GH-89435: os.path should not be a frozen module (#126924 )

2024-11-22 18:50:30 +00:00

frozenmain.c

gh-105716: Fix _PyInterpreterState_IsRunningMain() For Embedders (gh-117140)

2024-03-21 18:20:20 -06:00

future.c

gh-126139: Improve error message location for future statement with unknown feature (#126140 )

2024-10-29 23:57:59 +00:00

gc_free_threading.c

[3.14] gh-159111: Update vendored mimalloc to v2.5.2 (gh-159112) (gh-160183)

2026-10-22 09:54:37 -07:00

gc_gil.c

gh-100240: Use a consistent implementation for freelists (#121934 )

2024-07-22 12:08:27 -04:00

gc.c

[3.14] GH-148726: Add heap_size to _gc_runtime_state (#149025 )

2026-04-29 13:04:11 +03:00

generated_cases.c.h

[3.14] gh-154902: Type-check the SET_ADD operand (#155072 )

2026-08-05 07:24:50 -07:00

getargs.c

[3.14] gh-146615: Fix format specifiers in Python/ directory (GH-146619) (GH-146650)

2026-03-31 08:25:07 +00:00

getcompiler.c

…

getcopyright.c

gh-126133: Only use start year in PSF copyright, remove end years (#126236 )

2024-11-12 15:59:19 +02:00

getopt.c

GH-133336: Remove reserved `-J` flag for Jython (#133444 )

2025-05-05 15:09:19 +00:00

getplatform.c

…

getversion.c

[3.14] gh-119132: Remove "experimental" tag from the CPython free-threading. (gh-135550) (gh-135565)

2025-06-16 14:58:14 +00:00

hamt.c

[3.14] gh-155515: Use GC tracking for HAMT iterators (GH-155517) (#155698 )

2026-08-17 06:40:05 +03:00

hashtable.c

gh-111545: Add Py_HashPointer() function (#112096 )

2023-12-06 15:09:22 +01:00

import.c

[3.14] gh-156126: Fix crash in -X importtime with unencodable module … (#156330 )

2026-08-25 00:11:08 +03:00

importdl.c

[3.14] gh-140011: Delete importdl assertion that prevents importing embedded modules from packages (GH-141605) (#141986 )

2025-11-28 23:30:57 -08:00

index_pool.c

[3.14] gh-91048: Refactor and optimize remote debugging module (#134652 ) (#134673 )

2025-05-25 22:10:20 +00:00

initconfig.c

[3.14] gh-159739: Release replaced PyInitConfig strings (GH-159769) (#159810 )

2026-10-20 00:32:57 +00:00

instruction_sequence.c

GH-124715: Move trashcan mechanism into Py_Dealloc (GH-132280)

2025-04-30 11:37:53 +01:00

instrumentation.c

[3.14] gh-158121: Preserve instruction events when line monitoring is… (#159741 )

2026-10-19 14:19:52 -07:00

interpconfig.c

[3.14] gh-159739: Handle interpreter configuration encoding errors (GH-159747) (#159844 )

2026-10-20 11:12:29 -07:00

intrinsics.c

Get rid of ERROR_IF's "label" parameter (GH-132654)

2025-04-29 17:21:53 -07:00

jit.c

[3.14] GH-146128: Remove the buggy AArch64 "33rx" relocation (GH-146263) (#148198 )

2026-04-07 14:05:47 +03:00

legacy_tracing.c

[3.14] gh-148037: remove critical section from PyCode_Addr2Line (GH… (#148353 )

2026-04-10 23:59:38 +05:30

lock.c

[3.14] gh-158973: Reset the warnings lock after fork in the child (gh-158974) (gh-159615)

2026-10-20 00:06:42 +00:00

marshal.c

[3.14] gh-159111: Update vendored mimalloc to v2.5.2 (gh-159112) (gh-160183)

2026-10-22 09:54:37 -07:00

modsupport.c

gh-132909: handle overflow for 'K' format in do_mkvalue (#132911 )

2025-04-25 11:02:57 +00:00

mysnprintf.c

…

mystrtoul.c

gh-108765: Python.h no longer includes <ctype.h> (#108831 )

2023-09-03 18:54:27 +02:00

object_stack.c

gh-100240: Use a consistent implementation for freelists (#121934 )

2024-07-22 12:08:27 -04:00

opcode_targets.h

gh-100239: specialize BINARY_OP/SUBSCR for list-slice (#132626 )

2025-05-01 10:28:52 +00:00

optimizer_analysis.c

[3.14] gh-145235: Make dict watcher API thread-safe for free-threaded builds (gh-145233) (#149691 )

2026-05-12 13:21:31 -04:00

optimizer_bytecodes.c

[3.14] gh-135608: Add a null check for attribute promotion to fix a JIT crash (GH-135613) (#135739 )

2025-06-20 15:24:25 +08:00

optimizer_cases.c.h

[3.14] gh-135608: Add a null check for attribute promotion to fix a JIT crash (GH-135613) (#135739 )

2025-06-20 15:24:25 +08:00

optimizer_symbols.c

[3.14] gh-137728 gh-137762: Fix bugs in the JIT with many local variables (GH-137764) (#137999 )

2025-08-21 17:00:05 +03:00

optimizer.c

[3.14] gh-137007: Track executor before any possible deallocations (GH-137016) (GH-142541)

2025-12-10 22:54:28 +00:00

parking_lot.c

[3.14] gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852) (#148884 )

2026-04-22 18:59:58 +00:00

pathconfig.c

gh-111924: Fix data races when swapping allocators (gh-130287)

2025-02-20 11:31:15 -05:00

perf_jit_trampoline.c

[3.14] gh-156114: Fix crash in perf trampoline with unencodable code names (GH-156300) (#157775 )

2026-09-18 21:35:08 +00:00

perf_trampoline.c

[3.14] gh-156114: Fix crash in perf trampoline with unencodable code names (GH-156300) (#157775 )

2026-09-18 21:35:08 +00:00

preconfig.c

[3.14] gh-145092: Fix compiler warning for memchr() and wcschr() returning const pointer (GH-145093) (GH-145102)

2026-02-22 08:28:17 +00:00

pyarena.c

Chore: Fix typo in pyarena.c (#126527 )

2024-11-07 16:37:41 +01:00

pyctype.c

…

pyfpe.c

…

pyhash.c

gh-122854: Add Py_HashBuffer() function (#122855 )

2024-08-30 15:42:27 +00:00

pylifecycle.c

[3.14] gh-151218: Replace sys.flags in PyConfig_Set() (#151402 ) (#151553 )

2026-06-16 18:55:35 +02:00

pymath.c

…

pystate.c

[3.14] gh-159111: Update vendored mimalloc to v2.5.2 (gh-159112) (gh-160183)

2026-10-22 09:54:37 -07:00

pystrcmp.c

gh-108767: Replace ctype.h functions with pyctype.h functions (#108772 )

2023-09-01 18:36:53 +02:00

pystrhex.c

[3.14] gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548) (GH-142301)

2025-12-12 15:11:43 +00:00

pystrtod.c

[3.14] gh-158446: Reject float format precision near INT_MAX (GH-158474) (#158477 )

2026-09-30 08:36:53 +00:00

Python-ast.c

[3.14] gh-156909: Fix AST.__repr__ call getting the _fields attribute (GH-157490) (GH-157596) (GH-159232)

2026-10-13 12:12:05 +02:00

Python-tokenize.c

gh-111178: Fix function signatures for test_types (#131455 )

2025-03-19 13:46:17 +00:00

pythonrun.c

[3.14] gh-152132: Test Py_CompileString() in test_capi.test_run (#153470 ) (#153473 )

2026-07-10 02:08:14 +00:00

pytime.c

[3.14] gh-152849: Fix OverflowError message for out-of-range timestamps in the time module (GH-152850) (#153208 )

2026-07-06 15:16:34 +00:00

qsbr.c

[3.14] gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554) (#144923 )

2026-03-31 19:20:24 +00:00

README

…

remote_debug.h

[3.14] gh-158539: Fix macOS runtime section lookup for remote debugging (GH-158874) (#158906 )

2026-10-06 17:13:01 +01:00

remote_debugging.c

[3.14] gh-158893: Make os.strerror() thread-safe (#159120 ) (#159145 )

2026-10-10 20:54:38 +00:00

specialize.c

[3.14] gh-152075: Avoid lock contention in _Py_Specialize_LoadGlobal under free threading (gh-153720) (#158904 )

2026-10-06 18:47:51 +05:30

stackrefs.c

[3.14] gh-133590: ensure that TableEntry.linenumber_borrow is initialized (GH-133681) (#133872 )

2025-05-11 08:44:22 +00:00

stdlib_module_names.h

GH-91048: Minor fixes for `_remotedebugging & rename to _remote_debugging` (#133398 )

2025-05-05 02:30:14 +02:00

structmember.c

[3.14] gh-146270: Fix PyMember_SetOne(..., NULL) not being atomic (gh-148800) (#149460 )

2026-05-06 14:16:36 +00:00

suggestions.c

GH-131238: Core header refactor (GH-131250)

2025-03-17 09:19:04 +00:00

symtable.c

[3.14] gh-156525: fix a few error path scope management bugs in symtable (GH-156526) (#156533 )

2026-08-28 19:56:34 -07:00

sysmodule.c

[3.14] gh-151218: Replace sys.flags in PyConfig_Set() (#151402 ) (#151553 )

2026-06-16 18:55:35 +02:00

thread_nt.h

GH-131296: Add missing UNREACHABLE mark in thread_nt.h (GH-131589)

2025-03-31 20:28:35 +01:00

thread_pthread_stubs.h

gh-125161: return non zero value in pthread_self on wasi (#125303 )

2024-10-13 20:59:41 +05:30

thread_pthread.h

[3.14] gh-157415: Fix data race in pthread wrapper (#157430 ) (#159547 )

2026-10-16 15:55:12 +00:00

thread.c

gh-131238: Add explicit includes to pycore headers (#131257 )

2025-03-17 12:32:43 +01:00

tier2_engine.md

Docs: fix spelling of the word 'transferring' (#116641 )

2024-03-13 23:53:32 +01:00

traceback.c

[3.14] gh-113318: Fix @getter and @setter in Argument Clinic (GH-155778) (GH-156011)

2026-08-18 13:09:24 +00:00

tracemalloc.c

[3.14] gh-144763: Fix race conditions in tracemalloc (#144779 ) (#144965 )

2026-02-18 20:55:38 +01:00

uniqueid.c

gh-128923: Use zero to indicate unassigned unique id (#128925 )

2025-01-17 16:42:27 +01:00

vm-state.md

gh-133079: Remove Py_C_RECURSION_LIMIT & PyThreadState.c_recursion_remaining (GH-133080)

2025-04-29 12:56:20 +02:00

README

Miscellaneous source files for the main Python shared library