BytesWarning no longer emitted when the fromlist argument of
__import__() or the __all__ attribute of the module contain bytes
instances..
(cherry picked from commit 41c56940c6)
Class execution requires that __prepare__() methods return
a proper execution namespace. Check for that immediately
after calling __prepare__(), rather than passing it through
to the code execution machinery and potentially triggering
SystemError (in debug builds) or a cryptic TypeError
(in release builds).
Patch by Oren Milman.
(cherry picked from commit 5837d0418f)
* bpo-30923: Disable warning that has been part of -Wextra since gcc-7.0. (#3142)
(cherry picked from commit d73a960c57)
* bpo-30923: Silence fall-through warnings included in -Wextra since gcc-7.0. (#3157)
(cherry picked from commit f432a3234f)
* bpo-31275: Small refactoring to silence a fall-through warning. (#3206)
(cherry picked from commit 138753c1b9)
This undoes a853a8ba78 except for the pytime.c
parts. We want to continue to allow IEEE 754 doubles larger than FLT_MAX to be
rounded into finite floats. Tests were added to very this behavior.
(cherry picked from commit 2bb69a5b4e)
Use sys.modules.get() in the "with _ModuleLockManager(name):" block
to protect the dictionary key with the module lock and use an atomic
get to prevent race condition.
Remove also _bootstrap._POPULATE since it was unused
(_bootstrap_external now has its own _POPULATE object), add a new
_SENTINEL object instead.
(cherry picked from commit e72b1359f8)
instead of failing with SystemError.
Relative import from non-package now fails with ImportError rather than
SystemError.
(cherry picked from commit 8a9cd20edc)
* Rewrite importlib _get_module_lock(): it is now responsible to hold
the imp lock directly.
* _find_and_load() now holds the module lock to check if name is in
sys.modules to prevent a race condition
(cherry picked from commit 4f9a446f3f)
* [3.6] bpo-30703: Improve signal delivery (GH-2415)
* Improve signal delivery
Avoid using Py_AddPendingCall from signal handler, to avoid calling signal-unsafe functions.
* Remove unused function
* Improve comments
* Add stress test
* Adapt for --without-threads
* Add second stress test
* Add NEWS blurb
* Address comments @haypo.
(cherry picked from commit c08177a1cc)
* bpo-30796: Fix failures in signal delivery stress test (#2488)
* bpo-30796: Fix failures in signal delivery stress test
setitimer() can have a poor minimum resolution on some machines,
this would make the test reach its deadline (and a stray signal
could then kill a subsequent test).
* Make sure to clear the itimer after the test
Based on patch by Victor Stinner.
Add private C API function _PyUnicode_AsUnicode() which is similar to
PyUnicode_AsUnicode(), but checks for null characters..
(cherry picked from commit f7eae0adfc)
* bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to lock
This is especially important if PyThread_acquire_lock() is called reentrantly
(for example from a signal handler).
* Update 2017-06-26-14-29-50.bpo-30765.Q5iBmf.rst
* Avoid core logic when taking the mutex failed
(cherry picked from commit f84ac420c2)
Replace __PyCodeExtraState_Get() with __PyCodeExtraState_Get(void) to
fix the following GCC warning:
./Include/pystate.h:63:1: warning: function declaration isn't a prototype [-Wstrict-prototypes]
__PyCodeExtraState* __PyCodeExtraState_Get();
* Move co_extra_freefuncs to interpreter state to avoid crashes in
multi-threaded scenarios involving deletion of code objects
* Don't require that extra be zero initialized
* Build test list instead of defining empty test class
* Ensure extra is always assigned on success
* Keep the old fields in the thread state object, just don't use them
Add new linked list of code extra objects on a per-interpreter basis
so that interpreter state size isn't changed
* Rename __PyCodeExtraState_Get and add comment about it going away in 3.7
Fix sort order of import's in test_code.py
* Remove an extraneous space
* Remove docstrings for comments
* Touch up formatting
* Fix casing of coextra local
* Fix casing of another variable
* Prefix PyCodeExtraState with __ to match C API for getting it
* Update NEWS file for bpo-30604
If we have a chain of generators/coroutines that are 'yield from'ing
each other, then resuming the stack works like:
- call send() on the outermost generator
- this enters _PyEval_EvalFrameDefault, which re-executes the
YIELD_FROM opcode
- which calls send() on the next generator
- which enters _PyEval_EvalFrameDefault, which re-executes the
YIELD_FROM opcode
- ...etc.
However, every time we enter _PyEval_EvalFrameDefault, the first thing
we do is to check for pending signals, and if there are any then we
run the signal handler. And if it raises an exception, then we
immediately propagate that exception *instead* of starting to execute
bytecode. This means that e.g. a SIGINT at the wrong moment can "break
the chain" – it can be raised in the middle of our yield from chain,
with the bottom part of the stack abandoned for the garbage collector.
The fix is pretty simple: there's already a special case in
_PyEval_EvalFrameEx where it skips running signal handlers if the next
opcode is SETUP_FINALLY. (I don't see how this accomplishes anything
useful, but that's another story.) If we extend this check to also
skip running signal handlers when the next opcode is YIELD_FROM, then
that closes the hole – now the exception can only be raised at the
innermost stack frame.
This shouldn't have any performance implications, because the opcode
check happens inside the "slow path" after we've already determined
that there's a pending signal or something similar for us to process;
the vast majority of the time this isn't true and the new check
doesn't run at all..
(cherry picked from commit ab4413a7e9)
'invalid character in identifier' now is raised instead of
'f-string: empty expression not allowed' if a subexpression contains
only whitespaces and they are not accepted by Python parser.
(cherry picked from commit 2e9cd58)
xdegaye
Serhiy Storchaka
Miss Islington (bot)
Pablo Galindo
Victor Stinner
Benjamin Peterson
Zackery Spytz
INADA Naoki
Yuan Chao Chou
Masayuki Yamamoto
Antoine Pitrou
Dino Viehland
Yury Selivanov
Łukasz Langa
Xiang Zhang