Mailman 3 April 2013 - Python-checkins

Biggest Fake Conference in Computer Science
by eliswilson＠hushmail.com 30 Apr '13

30 Apr '13

Biggest Fake Conference in Computer Science We are researchers from different parts of the world and conducted a study on the world’s biggest bogus computer science conference WORLDCOMP http://sites.google.com/site/worlddump1 organized by Prof. Hamid Arabnia from University of Georgia, USA. We submitted a fake paper to WORLDCOMP 2011 and again (the same paper with a modified title) to WORLDCOMP 2012. This paper had numerous fundamental mistakes. Sample statements from that paper include: (1). Binary logic is fuzzy logic and vice versa (2). Pascal developed fuzzy logic (3). Object oriented languages do not exhibit any polymorphism or inheritance (4). TCP and IP are synonyms and are part of OSI model (5). Distributed systems deal with only one computer (6). Laptop is an example for a super computer (7). Operating system is an example for computer hardware Also, our paper did not express any conceptual meaning. However, it was accepted both the times without any modifications (and without any reviews) and we were invited to submit the final paper and a payment of $500+ fee to present the paper. We decided to use the fee for better purposes than making Prof. Hamid Arabnia richer. After that, we received few reminders from WORLDCOMP to pay the fee but we never responded. This fake paper is different from the two fake papers already published (see https://sites.google.com/site/worlddump4 for details) in WORLDCOMP. We MUST say that you should look at the above website if you have any thoughts of participating in WORLDCOMP. DBLP and other indexing agencies have stopped indexing WORLDCOMP’s proceedings since 2011 due to its fakeness. See http://www.informatik.uni-trier.de/~ley/db/conf/icai/index.html for of one of the conferences of WORLDCOMP and notice that there is no listing after 2010. See Section 2 of http://sites.google.com/site/dumpconf for comments from well-known researchers about WORLDCOMP. The status of your WORLDCOMP papers can be changed from scientific to other (i.e., junk or non-technical) at any time. Better not to have a paper than having it in WORLDCOMP and spoil the resume and peace of mind forever! Our study revealed that WORLDCOMP is money making business, using University of Georgia mask, for Prof. Hamid Arabnia. He is throwing out a small chunk of that money (around 20 dollars per paper published in WORLDCOMP’s proceedings) to his puppet (Mr. Ashu Solo or A.M.G. Solo) who publicizes WORLDCOMP and also defends it at various forums, using fake/anonymous names. The puppet uses fake names and defames other conferences to divert traffic to WORLDCOMP. He also makes anonymous phone calls and threatens the critiques of WORLDCOMP (See Item 7 of Section 5 of above website). That is, the puppet does all his best to get a maximum number of papers published at WORLDCOMP to get more money into his (and Prof. Hamid Arabnia’s) pockets. Prof. Hamid Arabnia makes a lot of tricks. For example, he appeared in a newspaper to fool the public, claiming him a victim of cyber-attack (see Item 8 in Section 5 of above website). Monte Carlo Resort (the venue of WORLDCOMP for more than 10 years, until 2012) has refused to provide the venue for WORLDCOMP’13 because of the fears of their image being tarnished due to WORLDCOMP’s fraudulent activities. That is why WORLDCOMP’13 is taking place at a different resort. WORLDCOMP will not be held after 2013. The draft paper submission deadline is over but still there are no committee members, no reviewers, and there is no conference Chairman. The only contact details available on WORLDCOMP’s website is just an email address! We ask Prof. Hamid Arabnia to publish all reviews for all the papers (after blocking identifiable details) since 2000 conference. Reveal the names and affiliations of all the reviewers (for each year) and how many papers each reviewer had reviewed on average. We also ask him to look at the Open Challenge (Section 6) at https://sites.google.com/site/moneycomp1 and respond if he has any professional values. Sorry for posting to multiple lists. Spreading the word is the only way to stop this bogus conference. Please forward this message to other mailing lists and people. We are shocked with Prof. Hamid Arabnia and his puppet’s activities at http://worldcomp-fake-bogus.blogspot.com Search Google using the keyword worldcomp fake for additional links.

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Biggest Fake Conference in Computer Science
by eliswilson＠hushmail.com 30 Apr '13

30 Apr '13

Biggest Fake Conference in Computer Science We are researchers from different parts of the world and conducted a study on the world’s biggest bogus computer science conference WORLDCOMP http://sites.google.com/site/worlddump1 organized by Prof. Hamid Arabnia from University of Georgia, USA. We submitted a fake paper to WORLDCOMP 2011 and again (the same paper with a modified title) to WORLDCOMP 2012. This paper had numerous fundamental mistakes. Sample statements from that paper include: (1). Binary logic is fuzzy logic and vice versa (2). Pascal developed fuzzy logic (3). Object oriented languages do not exhibit any polymorphism or inheritance (4). TCP and IP are synonyms and are part of OSI model (5). Distributed systems deal with only one computer (6). Laptop is an example for a super computer (7). Operating system is an example for computer hardware Also, our paper did not express any conceptual meaning. However, it was accepted both the times without any modifications (and without any reviews) and we were invited to submit the final paper and a payment of $500+ fee to present the paper. We decided to use the fee for better purposes than making Prof. Hamid Arabnia richer. After that, we received few reminders from WORLDCOMP to pay the fee but we never responded. This fake paper is different from the two fake papers already published (see https://sites.google.com/site/worlddump4 for details) in WORLDCOMP. We MUST say that you should look at the above website if you have any thoughts of participating in WORLDCOMP. DBLP and other indexing agencies have stopped indexing WORLDCOMP’s proceedings since 2011 due to its fakeness. See http://www.informatik.uni-trier.de/~ley/db/conf/icai/index.html for of one of the conferences of WORLDCOMP and notice that there is no listing after 2010. See Section 2 of http://sites.google.com/site/dumpconf for comments from well-known researchers about WORLDCOMP. The status of your WORLDCOMP papers can be changed from scientific to other (i.e., junk or non-technical) at any time. Better not to have a paper than having it in WORLDCOMP and spoil the resume and peace of mind forever! Our study revealed that WORLDCOMP is money making business, using University of Georgia mask, for Prof. Hamid Arabnia. He is throwing out a small chunk of that money (around 20 dollars per paper published in WORLDCOMP’s proceedings) to his puppet (Mr. Ashu Solo or A.M.G. Solo) who publicizes WORLDCOMP and also defends it at various forums, using fake/anonymous names. The puppet uses fake names and defames other conferences to divert traffic to WORLDCOMP. He also makes anonymous phone calls and threatens the critiques of WORLDCOMP (See Item 7 of Section 5 of above website). That is, the puppet does all his best to get a maximum number of papers published at WORLDCOMP to get more money into his (and Prof. Hamid Arabnia’s) pockets. Prof. Hamid Arabnia makes a lot of tricks. For example, he appeared in a newspaper to fool the public, claiming him a victim of cyber-attack (see Item 8 in Section 5 of above website). Monte Carlo Resort (the venue of WORLDCOMP for more than 10 years, until 2012) has refused to provide the venue for WORLDCOMP’13 because of the fears of their image being tarnished due to WORLDCOMP’s fraudulent activities. That is why WORLDCOMP’13 is taking place at a different resort. WORLDCOMP will not be held after 2013. The draft paper submission deadline is over but still there are no committee members, no reviewers, and there is no conference Chairman. The only contact details available on WORLDCOMP’s website is just an email address! We ask Prof. Hamid Arabnia to publish all reviews for all the papers (after blocking identifiable details) since 2000 conference. Reveal the names and affiliations of all the reviewers (for each year) and how many papers each reviewer had reviewed on average. We also ask him to look at the Open Challenge (Section 6) at https://sites.google.com/site/moneycomp1 and respond if he has any professional values. Sorry for posting to multiple lists. Spreading the word is the only way to stop this bogus conference. Please forward this message to other mailing lists and people. We are shocked with Prof. Hamid Arabnia and his puppet’s activities at http://worldcomp-fake-bogus.blogspot.com Search Google using the keyword worldcomp fake for additional links.

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cpython (2.7): Issue #17712: Fix test_gdb failures on Ubuntu 13.04.
by antoine.pitrou 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/c241831a91f2 changeset: 83578:c241831a91f2 branch: 2.7 parent: 83575:1b92a0112f5d user: Antoine Pitrou <solipsis(a)pitrou.net> date: Wed May 01 00:15:44 2013 +0200 summary: Issue #17712: Fix test_gdb failures on Ubuntu 13.04. files: Lib/test/test_gdb.py | 46 ++++++++++++++++--------------- Misc/NEWS | 2 + 2 files changed, 26 insertions(+), 22 deletions(-) diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py --- a/Lib/test/test_gdb.py +++ b/Lib/test/test_gdb.py @@ -142,30 +142,32 @@ # Use "args" to invoke gdb, capturing stdout, stderr: out, err = run_gdb(*args, PYTHONHASHSEED='0') - # Ignore some noise on stderr due to the pending breakpoint: - err = err.replace('Function "%s" not defined.\n' % breakpoint, '') - # Ignore some other noise on stderr (http://bugs.python.org/issue8600) - err = err.replace("warning: Unable to find libthread_db matching" - " inferior's thread library, thread debugging will" - " not be available.\n", - '') - err = err.replace("warning: Cannot initialize thread debugging" - " library: Debugger service failed\n", - '') - err = err.replace('warning: Could not load shared library symbols for ' - 'linux-vdso.so.1.\n' - 'Do you need "set solib-search-path" or ' - '"set sysroot"?\n', - '') - err = err.replace('warning: Could not load shared library symbols for ' - 'linux-gate.so.1.\n' - 'Do you need "set solib-search-path" or ' - '"set sysroot"?\n', - '') + errlines = err.splitlines() + unexpected_errlines = [] + + # Ignore some benign messages on stderr. + ignore_patterns = ( + 'Function "%s" not defined.' % breakpoint, + "warning: no loadable sections found in added symbol-file" + " system-supplied DSO", + "warning: Unable to find libthread_db matching" + " inferior's thread library, thread debugging will" + " not be available.", + "warning: Cannot initialize thread debugging" + " library: Debugger service failed", + 'warning: Could not load shared library symbols for ' + 'linux-vdso.so', + 'warning: Could not load shared library symbols for ' + 'linux-gate.so', + 'Do you need "set solib-search-path" or ' + '"set sysroot"?', + ) + for line in errlines: + if not line.startswith(ignore_patterns): + unexpected_errlines.append(line) # Ensure no unexpected error messages: - self.assertEqual(err, '') - + self.assertEqual(unexpected_errlines, []) return out def get_gdb_repr(self, source, diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -76,6 +76,8 @@ Tests ----- +- Issue #17712: Fix test_gdb failures on Ubuntu 13.04. + - Issue #17065: Use process-unique key for winreg tests to avoid failures if test is run multiple times in parallel (eg: on a buildbot host). -- Repository URL: http://hg.python.org/cpython

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cpython (merge 3.3 -> default): Issue #17712: Fix test_gdb failures on Ubuntu 13.04.
by antoine.pitrou 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/4e186581fea7 changeset: 83577:4e186581fea7 parent: 83574:747cede24367 parent: 83576:4e58cafbebfc user: Antoine Pitrou <solipsis(a)pitrou.net> date: Wed May 01 00:17:45 2013 +0200 summary: Issue #17712: Fix test_gdb failures on Ubuntu 13.04. files: Lib/test/test_gdb.py | 45 +++++++++++++++++-------------- Misc/NEWS | 2 + 2 files changed, 26 insertions(+), 21 deletions(-) diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py --- a/Lib/test/test_gdb.py +++ b/Lib/test/test_gdb.py @@ -145,29 +145,32 @@ # Use "args" to invoke gdb, capturing stdout, stderr: out, err = run_gdb(*args, PYTHONHASHSEED='0') - # Ignore some noise on stderr due to the pending breakpoint: - err = err.replace('Function "%s" not defined.\n' % breakpoint, '') - # Ignore some other noise on stderr (http://bugs.python.org/issue8600) - err = err.replace("warning: Unable to find libthread_db matching" - " inferior's thread library, thread debugging will" - " not be available.\n", - '') - err = err.replace("warning: Cannot initialize thread debugging" - " library: Debugger service failed\n", - '') - err = err.replace('warning: Could not load shared library symbols for ' - 'linux-vdso.so.1.\n' - 'Do you need "set solib-search-path" or ' - '"set sysroot"?\n', - '') - err = err.replace('warning: Could not load shared library symbols for ' - 'linux-gate.so.1.\n' - 'Do you need "set solib-search-path" or ' - '"set sysroot"?\n', - '') + errlines = err.splitlines() + unexpected_errlines = [] + + # Ignore some benign messages on stderr. + ignore_patterns = ( + 'Function "%s" not defined.' % breakpoint, + "warning: no loadable sections found in added symbol-file" + " system-supplied DSO", + "warning: Unable to find libthread_db matching" + " inferior's thread library, thread debugging will" + " not be available.", + "warning: Cannot initialize thread debugging" + " library: Debugger service failed", + 'warning: Could not load shared library symbols for ' + 'linux-vdso.so', + 'warning: Could not load shared library symbols for ' + 'linux-gate.so', + 'Do you need "set solib-search-path" or ' + '"set sysroot"?', + ) + for line in errlines: + if not line.startswith(ignore_patterns): + unexpected_errlines.append(line) # Ensure no unexpected error messages: - self.assertEqual(err, '') + self.assertEqual(unexpected_errlines, []) return out def get_gdb_repr(self, source, diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -176,6 +176,8 @@ Tests ----- +- Issue #17712: Fix test_gdb failures on Ubuntu 13.04. + - Issue #17835: Fix test_io when the default OS pipe buffer size is larger than one million bytes. -- Repository URL: http://hg.python.org/cpython

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cpython (3.3): Issue #17712: Fix test_gdb failures on Ubuntu 13.04.
by antoine.pitrou 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/4e58cafbebfc changeset: 83576:4e58cafbebfc branch: 3.3 parent: 83573:474f28bf67b3 user: Antoine Pitrou <solipsis(a)pitrou.net> date: Wed May 01 00:15:44 2013 +0200 summary: Issue #17712: Fix test_gdb failures on Ubuntu 13.04. files: Lib/test/test_gdb.py | 45 +++++++++++++++++-------------- Misc/NEWS | 2 + 2 files changed, 26 insertions(+), 21 deletions(-) diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py --- a/Lib/test/test_gdb.py +++ b/Lib/test/test_gdb.py @@ -145,29 +145,32 @@ # Use "args" to invoke gdb, capturing stdout, stderr: out, err = run_gdb(*args, PYTHONHASHSEED='0') - # Ignore some noise on stderr due to the pending breakpoint: - err = err.replace('Function "%s" not defined.\n' % breakpoint, '') - # Ignore some other noise on stderr (http://bugs.python.org/issue8600) - err = err.replace("warning: Unable to find libthread_db matching" - " inferior's thread library, thread debugging will" - " not be available.\n", - '') - err = err.replace("warning: Cannot initialize thread debugging" - " library: Debugger service failed\n", - '') - err = err.replace('warning: Could not load shared library symbols for ' - 'linux-vdso.so.1.\n' - 'Do you need "set solib-search-path" or ' - '"set sysroot"?\n', - '') - err = err.replace('warning: Could not load shared library symbols for ' - 'linux-gate.so.1.\n' - 'Do you need "set solib-search-path" or ' - '"set sysroot"?\n', - '') + errlines = err.splitlines() + unexpected_errlines = [] + + # Ignore some benign messages on stderr. + ignore_patterns = ( + 'Function "%s" not defined.' % breakpoint, + "warning: no loadable sections found in added symbol-file" + " system-supplied DSO", + "warning: Unable to find libthread_db matching" + " inferior's thread library, thread debugging will" + " not be available.", + "warning: Cannot initialize thread debugging" + " library: Debugger service failed", + 'warning: Could not load shared library symbols for ' + 'linux-vdso.so', + 'warning: Could not load shared library symbols for ' + 'linux-gate.so', + 'Do you need "set solib-search-path" or ' + '"set sysroot"?', + ) + for line in errlines: + if not line.startswith(ignore_patterns): + unexpected_errlines.append(line) # Ensure no unexpected error messages: - self.assertEqual(err, '') + self.assertEqual(unexpected_errlines, []) return out def get_gdb_repr(self, source, diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -147,6 +147,8 @@ Tests ----- +- Issue #17712: Fix test_gdb failures on Ubuntu 13.04. + - Issue #17835: Fix test_io when the default OS pipe buffer size is larger than one million bytes. -- Repository URL: http://hg.python.org/cpython

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cpython (2.7): #16518: add "bytes-like object" to the glossary.
by ezio.melotti 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/1b92a0112f5d changeset: 83575:1b92a0112f5d branch: 2.7 parent: 83564:6b409ab596db user: Ezio Melotti <ezio.melotti(a)gmail.com> date: Tue Apr 30 23:33:31 2013 +0300 summary: #16518: add "bytes-like object" to the glossary. files: Doc/glossary.rst | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/Doc/glossary.rst b/Doc/glossary.rst --- a/Doc/glossary.rst +++ b/Doc/glossary.rst @@ -77,6 +77,10 @@ Benevolent Dictator For Life, a.k.a. `Guido van Rossum <http://www.python.org/~guido/>`_, Python's creator. + bytes-like object + An object that supports the :ref:`bufferobjects`, like :class:`bytes` or + :class:`bytearray`. + bytecode Python source code is compiled into bytecode, the internal representation of a Python program in the CPython interpreter. The bytecode is also -- Repository URL: http://hg.python.org/cpython

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cpython (merge 3.3 -> default): #16518: merge with 3.3.
by ezio.melotti 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/747cede24367 changeset: 83574:747cede24367 parent: 83572:cf65c7a75f55 parent: 83573:474f28bf67b3 user: Ezio Melotti <ezio.melotti(a)gmail.com> date: Tue Apr 30 23:34:41 2013 +0300 summary: #16518: merge with 3.3. files: Doc/glossary.rst | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/Doc/glossary.rst b/Doc/glossary.rst --- a/Doc/glossary.rst +++ b/Doc/glossary.rst @@ -78,6 +78,10 @@ Benevolent Dictator For Life, a.k.a. `Guido van Rossum <http://www.python.org/~guido/>`_, Python's creator. + bytes-like object + An object that supports the :ref:`bufferobjects`, like :class:`bytes` or + :class:`bytearray`. + bytecode Python source code is compiled into bytecode, the internal representation of a Python program in the CPython interpreter. The bytecode is also -- Repository URL: http://hg.python.org/cpython

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cpython (3.3): #16518: add "bytes-like object" to the glossary.
by ezio.melotti 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/474f28bf67b3 changeset: 83573:474f28bf67b3 branch: 3.3 parent: 83570:6e9d21761fc1 user: Ezio Melotti <ezio.melotti(a)gmail.com> date: Tue Apr 30 23:33:31 2013 +0300 summary: #16518: add "bytes-like object" to the glossary. files: Doc/glossary.rst | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/Doc/glossary.rst b/Doc/glossary.rst --- a/Doc/glossary.rst +++ b/Doc/glossary.rst @@ -78,6 +78,10 @@ Benevolent Dictator For Life, a.k.a. `Guido van Rossum <http://www.python.org/~guido/>`_, Python's creator. + bytes-like object + An object that supports the :ref:`bufferobjects`, like :class:`bytes` or + :class:`bytearray`. + bytecode Python source code is compiled into bytecode, the internal representation of a Python program in the CPython interpreter. The bytecode is also -- Repository URL: http://hg.python.org/cpython

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peps: Clarify weasel-words for getaddrinfo().
by guido.van.rossum 30 Apr '13

30 Apr '13

http://hg.python.org/peps/rev/a5e25c95fba4 changeset: 4868:a5e25c95fba4 user: Guido van Rossum <guido(a)python.org> date: Tue Apr 30 10:38:12 2013 -0700 summary: Clarify weasel-words for getaddrinfo(). files: pep-3156.txt | 15 ++++++++++----- 1 files changed, 10 insertions(+), 5 deletions(-) diff --git a/pep-3156.txt b/pep-3156.txt --- a/pep-3156.txt +++ b/pep-3156.txt @@ -430,12 +430,17 @@ implement their own DNS lookup. The optional arguments *must* be specified as keyword arguments. - Note: implementations are required to implement a subset of the full + Note: implementations are allowed to implement a subset of the full socket.getaddrinfo() interface; e.g. they may not support symbolic - port names, or they may ignore or incompletely implement the type, - proto and flags arguments. However, if ``type`` and ``proto`` are - ignored, the argument values should be reflected unchanged in the - return tuples' ``socket_type`` and ``socket_protocol`` elements. + port names, or they may ignore or incompletely implement the + ``type``, ``proto`` and ``flags`` arguments. However, if ``type`` + and ``proto`` are ignored, the argument values passed in should be + copied unchanged into the return tuples' ``socket_type`` and + ``socket_protocol`` elements. (You can't ignore ``family``, since + IPv4 and IPv6 addresses must be looked up differently. The only + permissible values for ``family`` are ``socket.AF_UNSPEC`` (``0``), + ``socket.AF_INET`` and ``socket.AF_INET6``, and the latter only if + it is defined by the platform.) - ``getnameinfo(sockaddr, flags=0)``. Similar to ``socket.getnameinfo()`` but returns a Future. The Future's result -- Repository URL: http://hg.python.org/peps

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cpython: check local class namespace before reaching for cells (closes #17853)
by benjamin.peterson 30 Apr '13

30 Apr '13

http://hg.python.org/cpython/rev/cf65c7a75f55 changeset: 83572:cf65c7a75f55 user: Benjamin Peterson <benjamin(a)python.org> date: Tue Apr 30 09:41:40 2013 -0400 summary: check local class namespace before reaching for cells (closes #17853) files: Doc/library/dis.rst | 7 + Include/opcode.h | 1 + Lib/importlib/_bootstrap.py | 4 +- Lib/opcode.py | 3 + Lib/test/test_scope.py | 13 + Misc/NEWS | 3 + Python/ceval.c | 33 +++ Python/compile.c | 5 +- Python/importlib.h | 238 ++++++++++++------------ Python/opcode_targets.h | 2 +- 10 files changed, 187 insertions(+), 122 deletions(-) diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst --- a/Doc/library/dis.rst +++ b/Doc/library/dis.rst @@ -722,6 +722,13 @@ Pushes a reference to the object the cell contains on the stack. +.. opcode:: LOAD_CLASSDEREF (i) + + Much like :opcode:`LOAD_DEREF` but first checks the locals dictionary before + consulting the cell. This is used for loading free variables in class + bodies. + + .. opcode:: STORE_DEREF (i) Stores TOS into the cell contained in slot *i* of the cell and free variable diff --git a/Include/opcode.h b/Include/opcode.h --- a/Include/opcode.h +++ b/Include/opcode.h @@ -140,6 +140,7 @@ #define SET_ADD 146 #define MAP_ADD 147 +#define LOAD_CLASSDEREF 148 /* EXCEPT_HANDLER is a special, implicit block type which is created when entering an except handler. It is not an opcode but we define it here diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py --- a/Lib/importlib/_bootstrap.py +++ b/Lib/importlib/_bootstrap.py @@ -388,12 +388,14 @@ # Python 3.3a4 3230 (revert changes to implicit __class__ closure) # Python 3.4a1 3250 (evaluate positional default arguments before # keyword-only defaults) +# Python 3.4a1 3260 (add LOAD_CLASSDEREF; allow locals of class to override +# free vars) # # MAGIC must change whenever the bytecode emitted by the compiler may no # longer be understood by older implementations of the eval loop (usually # due to the addition of new opcodes). -_MAGIC_BYTES = (3250).to_bytes(2, 'little') + b'\r\n' +_MAGIC_BYTES = (3260).to_bytes(2, 'little') + b'\r\n' _RAW_MAGIC_NUMBER = int.from_bytes(_MAGIC_BYTES, 'little') _PYCACHE = '__pycache__' diff --git a/Lib/opcode.py b/Lib/opcode.py --- a/Lib/opcode.py +++ b/Lib/opcode.py @@ -179,6 +179,9 @@ def_op('SET_ADD', 146) def_op('MAP_ADD', 147) +def_op('LOAD_CLASSDEREF', 148) +hasfree.append(148) + def_op('EXTENDED_ARG', 144) EXTENDED_ARG = 144 diff --git a/Lib/test/test_scope.py b/Lib/test/test_scope.py --- a/Lib/test/test_scope.py +++ b/Lib/test/test_scope.py @@ -714,6 +714,19 @@ global a + def testClassNamespaceOverridesClosure(self): + # See #17853. + x = 42 + class X: + locals()["x"] = 43 + y = x + self.assertEqual(X.y, 43) + class X: + locals()["x"] = 43 + del x + self.assertFalse(hasattr(X, "x")) + self.assertEqual(x, 42) + def test_main(): run_unittest(ScopeTests) diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -10,6 +10,9 @@ Core and Builtins ----------------- +- Issue #17853: Ensure locals of a class that shadow free variables always win + over the closures. + - Issue #17863: In the interactive console, don't loop forever if the encoding can't be fetched from stdin. diff --git a/Python/ceval.c b/Python/ceval.c --- a/Python/ceval.c +++ b/Python/ceval.c @@ -2260,6 +2260,39 @@ DISPATCH(); } + TARGET(LOAD_CLASSDEREF) { + PyObject *name, *value, *locals = f->f_locals; + int idx; + assert(locals); + assert(oparg >= PyTuple_GET_SIZE(co->co_cellvars)); + idx = oparg - PyTuple_GET_SIZE(co->co_cellvars); + assert(idx >= 0 && idx < PyTuple_GET_SIZE(co->co_freevars)); + name = PyTuple_GET_ITEM(co->co_freevars, idx); + if (PyDict_CheckExact(locals)) { + value = PyDict_GetItem(locals, name); + Py_XINCREF(value); + } + else { + value = PyObject_GetItem(locals, name); + if (value == NULL && PyErr_Occurred()) { + if (!PyErr_ExceptionMatches(PyExc_KeyError)) + goto error; + PyErr_Clear(); + } + } + if (!value) { + PyObject *cell = freevars[oparg]; + value = PyCell_GET(cell); + if (value == NULL) { + format_exc_unbound(co, oparg); + goto error; + } + Py_INCREF(value); + } + PUSH(value); + DISPATCH(); + } + TARGET(LOAD_DEREF) { PyObject *cell = freevars[oparg]; PyObject *value = PyCell_GET(cell); diff --git a/Python/compile.c b/Python/compile.c --- a/Python/compile.c +++ b/Python/compile.c @@ -970,6 +970,7 @@ case LOAD_CLOSURE: return 1; case LOAD_DEREF: + case LOAD_CLASSDEREF: return 1; case STORE_DEREF: return -1; @@ -2677,7 +2678,9 @@ switch (optype) { case OP_DEREF: switch (ctx) { - case Load: op = LOAD_DEREF; break; + case Load: + op = (c->u->u_ste->ste_type == ClassBlock) ? LOAD_CLASSDEREF : LOAD_DEREF; + break; case Store: op = STORE_DEREF; break; case AugLoad: case AugStore: diff --git a/Python/importlib.h b/Python/importlib.h --- a/Python/importlib.h +++ b/Python/importlib.h [stripped] diff --git a/Python/opcode_targets.h b/Python/opcode_targets.h --- a/Python/opcode_targets.h +++ b/Python/opcode_targets.h @@ -147,7 +147,7 @@ &&TARGET_LIST_APPEND, &&TARGET_SET_ADD, &&TARGET_MAP_ADD, - &&_unknown_opcode, + &&TARGET_LOAD_CLASSDEREF, &&_unknown_opcode, &&_unknown_opcode, &&_unknown_opcode, -- Repository URL: http://hg.python.org/cpython

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