Import upstream CPython branch '3.14'

Summary:
Imported Python `3.14.0rc3+` from upstream rev [`622f37f9dd0624b97e599ebb44bfa5cbdf86cfb6`](https://www.github.com/python/cpython/commit/622f37f9dd0624b97e599ebb44bfa5cbdf86cfb6) (committed 2025-09-29 21:12:28+00:00).

# Commit Info

Base: (`3.14.0rc3+`) - [`7a65a477951a541e29920832e4ab90e0b7783f21`](https://www.github.com/python/cpython/commit/7a65a477951a541e29920832e4ab90e0b7783f21) (commit date: 2025-09-29 08:16:25+00:00)
Imported: (`3.14.0rc3+`) - [`622f37f9dd0624b97e599ebb44bfa5cbdf86cfb6`](https://www.github.com/python/cpython/commit/622f37f9dd0624b97e599ebb44bfa5cbdf86cfb6) (commit date: 2025-09-29 21:12:28+00:00)

Reviewed By: itamaro

Differential Revision: D83562571

fbshipit-source-id: 7771efabcf53fe5cef37e694154aea3a138e0cca

Author: generatedunixname1734921407115435

Doc/library/dis.rst

@@ -1102,11 +1102,6 @@ iterations of the loop.
    Pushes ``co_consts[consti]`` onto the stack.
 
 
-.. opcode:: LOAD_CONST_IMMORTAL (consti)
-
-   Works as :opcode:`LOAD_CONST`, but is more efficient for immortal objects.
-
-
 .. opcode:: LOAD_SMALL_INT (i)
 
    Pushes the integer ``i`` onto the stack.
@@ -1647,7 +1642,7 @@ iterations of the loop.
 
    Pushes a ``NULL`` to the stack.
    Used in the call sequence to match the ``NULL`` pushed by
-   :opcode:`LOAD_METHOD` for non-method calls.
+   :opcode:`!LOAD_METHOD` for non-method calls.
 
    .. versionadded:: 3.11
 
@@ -1968,14 +1963,20 @@ but are replaced by real opcodes or removed before bytecode is generated.
    Marks the end of the code block associated with the last ``SETUP_FINALLY``,
    ``SETUP_CLEANUP`` or ``SETUP_WITH``.
 
+
+.. opcode:: LOAD_CONST_IMMORTAL (consti)
+
+   Works as :opcode:`LOAD_CONST`, but is more efficient for immortal objects.
+
+
 .. opcode:: JUMP
-.. opcode:: JUMP_NO_INTERRUPT
+            JUMP_NO_INTERRUPT
 
    Undirected relative jump instructions which are replaced by their
    directed (forward/backward) counterparts by the assembler.
 
 .. opcode:: JUMP_IF_TRUE
-.. opcode:: JUMP_IF_FALSE
+            JUMP_IF_FALSE
 
    Conditional jumps which do not impact the stack. Replaced by the sequence
    ``COPY 1``, ``TO_BOOL``, ``POP_JUMP_IF_TRUE/FALSE``.
@@ -1991,12 +1992,6 @@ but are replaced by real opcodes or removed before bytecode is generated.
       This opcode is now a pseudo-instruction.
 
 
-.. opcode:: LOAD_METHOD
-
-   Optimized unbound method lookup. Emitted as a ``LOAD_ATTR`` opcode
-   with a flag set in the arg.
-
-
 .. _opcode_collections:
 
 Opcode collections

Doc/tools/templates/download.html

@@ -40,11 +40,6 @@ <h1>{% trans %}Download Python {{ dl_version }} documentation{% endtrans %}</h1>
     <th>{% trans %}Packed as .zip{% endtrans %}</th>
     <th>{% trans %}Packed as .tar.bz2{% endtrans %}</th>
   </tr>
-  <tr>
-    <td>{% trans %}PDF{% endtrans %}</td>
-    <td>{% trans download_size="17" %}<a href="{{ dl_base }}/python-{{ dl_version }}-docs-pdf-a4.zip">Download</a> (ca. {{ download_size }} MiB){% endtrans %}</td>
-    <td>{% trans download_size="17" %}<a href="{{ dl_base }}/python-{{ dl_version }}-docs-pdf-a4.tar.bz2">Download</a> (ca. {{ download_size }} MiB){% endtrans %}</td>
-  </tr>
   <tr>
     <td>{% trans %}HTML{% endtrans %}</td>
     <td>{% trans download_size="13" %}<a href="{{ dl_base }}/python-{{ dl_version }}-docs-html.zip">Download</a> (ca. {{ download_size }} MiB){% endtrans %}</td>
@@ -69,6 +64,13 @@ <h1>{% trans %}Download Python {{ dl_version }} documentation{% endtrans %}</h1>
 
 <p>{% trans %}These archives contain all the content in the documentation.{% endtrans %}</p>
 
+<p>{% trans %}
+We no longer provide pre-built PDFs of the documentation.
+To build a PDF archive, follow the instructions in the
+<a href="https://devguide.python.org/documentation/start-documenting/#building-the-documentation">Developer's Guide</a>
+and run <code>make dist-pdf</code> in the <code>Doc/</code> directory of a copy of the CPython repository.
+{% endtrans %}</p>
+
 
 <h2>{% trans %}Unpacking{% endtrans %}</h2>
 

Doc/whatsnew/3.14.rst

@@ -2800,9 +2800,79 @@ Deprecated
 CPython bytecode changes
 ========================
 
-* Replaced the opcode ``BINARY_SUBSCR`` by :opcode:`BINARY_OP` with oparg ``NB_SUBSCR``.
+* Replaced the opcode :opcode:`!BINARY_SUBSCR` by the :opcode:`BINARY_OP`
+  opcode with the ``NB_SUBSCR`` oparg.
   (Contributed by Irit Katriel in :gh:`100239`.)
 
+* Add the :opcode:`BUILD_INTERPOLATION` and :opcode:`BUILD_TEMPLATE`
+  opcodes to construct new :class:`~string.templatelib.Interpolation`
+  and :class:`~string.templatelib.Template` instances, respectively.
+  (Contributed by Lysandros Nikolaou and others in :gh:`132661`;
+  see also :ref:`PEP 750: Template strings <whatsnew314-pep750>`).
+
+* Remove the :opcode:`!BUILD_CONST_KEY_MAP` opcode.
+  Use :opcode:`BUILD_MAP` instead.
+  (Contributed by Mark Shannon in :gh:`122160`.)
+
+* Replace the :opcode:`!LOAD_ASSERTION_ERROR` opcode with
+  :opcode:`LOAD_COMMON_CONSTANT` and add support for loading
+  :exc:`NotImplementedError`.
+
+* Add the :opcode:`LOAD_FAST_BORROW` and :opcode:`LOAD_FAST_BORROW_LOAD_FAST_BORROW`
+  opcodes to reduce reference counting overhead when the interpreter can prove
+  that the reference in the frame outlives the reference loaded onto the stack.
+  (Contributed by Matt Page in :gh:`130704`.)
+
+* Add the :opcode:`LOAD_SMALL_INT` opcode, which pushes a small integer
+  equal to the ``oparg`` to the stack.
+  The :opcode:`!RETURN_CONST` opcode is removed as it is no longer used.
+  (Contributed by Mark Shannon in :gh:`125837`.)
+
+* Add the new :opcode:`LOAD_SPECIAL` instruction.
+  Generate code for :keyword:`with` and :keyword:`async with` statements
+  using the new instruction.
+  Removed the :opcode:`!BEFORE_WITH` and :opcode:`!BEFORE_ASYNC_WITH` instructions.
+  (Contributed by Mark Shannon in :gh:`120507`.)
+
+* Add the :opcode:`POP_ITER` opcode to support 'virtual' iterators.
+  (Contributed by Mark Shannon in :gh:`132554`.)
+
+Pseudo-instructions
+-------------------
+
+* Add the :opcode:`!ANNOTATIONS_PLACEHOLDER` pseudo instruction
+  to support partially executed module-level annotations with
+  :ref:`deferred evaluation of annotations <whatsnew314-pep649>`.
+  (Contributed by Jelle Zijlstra in :gh:`130907`.)
+
+* Add the :opcode:`!BINARY_OP_EXTEND` pseudo instruction,
+  which executes a pair of functions (guard and specialization functions)
+  accessed from the inline cache.
+  (Contributed by Irit Katriel in :gh:`100239`.)
+
+* Add three specializations for :opcode:`CALL_KW`;
+  :opcode:`!CALL_KW_PY` for calls to Python functions,
+  :opcode:`!CALL_KW_BOUND_METHOD` for calls to bound methods, and
+  :opcode:`!CALL_KW_NON_PY` for all other calls.
+  (Contributed by Mark Shannon in :gh:`118093`.)
+
+* Add the :opcode:`JUMP_IF_TRUE` and :opcode:`JUMP_IF_FALSE` pseudo instructions,
+  conditional jumps which do not impact the stack.
+  Replaced by the sequence ``COPY 1``, ``TO_BOOL``, ``POP_JUMP_IF_TRUE/FALSE``.
+  (Contributed by Irit Katriel in :gh:`124285`.)
+
+* Add the :opcode:`!LOAD_CONST_MORTAL` pseudo instruction.
+  (Contributed by Mark Shannon in :gh:`128685`.)
+
+* Add the :opcode:`LOAD_CONST_IMMORTAL` pseudo instruction,
+  which does the same as :opcode:`!LOAD_CONST`, but is more efficient
+  for immortal objects.
+  (Contributed by Mark Shannon in :gh:`125837`.)
+
+* Add the :opcode:`NOT_TAKEN` pseudo instruction, used by :mod:`sys.monitoring`
+  to record branch events (such as :monitoring-event:`BRANCH_LEFT`).
+  (Contributed by Mark Shannon in :gh:`122548`.)
+
 
 C API changes
 =============

Doc/whatsnew/3.7.rst

@@ -2483,7 +2483,7 @@ avoiding possible problems use new functions :c:func:`PySlice_Unpack` and
 CPython bytecode changes
 ------------------------
 
-There are two new opcodes: :opcode:`LOAD_METHOD` and :opcode:`!CALL_METHOD`.
+There are two new opcodes: :opcode:`!LOAD_METHOD` and :opcode:`!CALL_METHOD`.
 (Contributed by Yury Selivanov and INADA Naoki in :issue:`26110`.)
 
 The :opcode:`!STORE_ANNOTATION` opcode has been removed.

Lib/_pyrepl/utils.py

@@ -20,6 +20,7 @@
 ZERO_WIDTH_BRACKET = re.compile(r"\x01.*?\x02")
 ZERO_WIDTH_TRANS = str.maketrans({"\x01": "", "\x02": ""})
 IDENTIFIERS_AFTER = {"def", "class"}
+KEYWORD_CONSTANTS = {"True", "False", "None"}
 BUILTINS = {str(name) for name in dir(builtins) if not name.startswith('_')}
 
 
@@ -196,12 +197,12 @@ def gen_colors_from_token_stream(
                     is_def_name = False
                     span = Span.from_token(token, line_lengths)
                     yield ColorSpan(span, "definition")
-                elif token.string in ("True", "False", "None"):
-                    span = Span.from_token(token, line_lengths)
-                    yield ColorSpan(span, "keyword_constant")
                 elif keyword.iskeyword(token.string):
+                    span_cls = "keyword"
+                    if token.string in KEYWORD_CONSTANTS:
+                        span_cls = "keyword_constant"
                     span = Span.from_token(token, line_lengths)
-                    yield ColorSpan(span, "keyword")
+                    yield ColorSpan(span, span_cls)
                     if token.string in IDENTIFIERS_AFTER:
                         is_def_name = True
                 elif (

Programs/_testembed.c

@@ -360,8 +360,18 @@ static int test_pre_initialization_sys_options(void)
     size_t xoption_len = wcslen(static_xoption);
     wchar_t *dynamic_once_warnoption = \
              (wchar_t *) calloc(warnoption_len+1, sizeof(wchar_t));
+    if (dynamic_once_warnoption == NULL) {
+        error("out of memory allocating warnoption");
+        return 1;
+    }
     wchar_t *dynamic_xoption = \
              (wchar_t *) calloc(xoption_len+1, sizeof(wchar_t));
+    if (dynamic_xoption == NULL) {
+        free(dynamic_once_warnoption);
+        error("out of memory allocating xoption");
+        return 1;
+    }
+
     wcsncpy(dynamic_once_warnoption, static_warnoption, warnoption_len+1);
     wcsncpy(dynamic_xoption, static_xoption, xoption_len+1);