cpython/BUGS

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Sorry, this list does not claim completeness. If I fixed a bug
immediately upon receiving the first complaint I usually did not
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nother to make an entry in this file, unless it was a serious bug
(core dump or infinite loop).
==> Status indicators: (-) not fixed; (*) fixed; (?) not sure.
======================================================================
Known BUGS in 1.1.1 and 1.2
---------------------------
(-) C-level coerce() doesn't call __coerce__ when it should (and
similar for __cmp__)
(-) tkinter seems to leave an exception around sometime which breaks
unmarshalling code objects [hard to reproduce, have added a trap to
catch it]
(-) destroying all modules may destroy __builtin__ (or other modules)
while destructors of other modules may still need it [hard to fix --
could maintain a list of all modules in order of importation so we can
destroy them in reverse order??? really hopeless -- would have to
destroy objects in a module in reverse order too...]
(-) [X]DECREF can cause the interpreter to be called recursively (for
__del__ disciplines) -- so list and dict implementation calls doing
DECREF can cause recursive calls to methods of the object being
modified. Other files too. [Only partially fixed -- listobject.c is
still suspect.]
(-) if __getattr__ prints something, calling repr(x) from cmd line
forgets a newline
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(-) doneimport() should be called *before* the Py_AtExit code is
called [problem: what if other threads are still active?]
Environmental bugs
------------------
(-) tkinter doesn't seem to see any declaration of malloc on sunos 4.1.3
(-) arraymodule doesn't compile under Ultrix (FPROTO macro)
(-) Linux uses GNU getopt by default which is broken
(-) makesetup assumes CCC is the C++ compiler -- not portable
(-) "make depend" assumes mkdep exists -- not portable
(-) regen calls h2py which isn't defined by default
(-) make libinstall (or similar) references to machdep directory but
doesn't create it
(-) HP doesn't compile out of the box (needs LIBS=-ldld or
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LIBS=/usr/lib/libdld.sl) [hard to test without a HP machine handy]
======================================================================
BUGS present in 1.1.1 and fixed in 1.2
--------------------------------------
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(*) struct module aligns doubles wrongly when compiled with -DDEBUG on
sparc
(*) memory leak (namebuf) in initmodule2
(*) hash() of float values returns bogus values
(*) pow(int, int, long) does wrong series of DECREF() calls.
(*) flushline() may clear the exception condition so shouldn't be
called before print_error()
(*) Everything else that uses err_get() should use err_fetch()
(*) sockets aren't thread safe (address of static struct returned,
some calls aren't thread safe)
(*) threadmodule.c leaks LOTS of memory at thread exit
(*) shared install in Modules still doesn't work for empty list
(*) threadmodule.c leaks 'res' in t_bootstrap
(*) errors.c shouldn't declare strerror() on NT
(*) DECREF can cause the interpreter to be called recursively (for
__del__ disciplines) -- so list and dict implementation calls doing
DECREF can cause recursive calls to methods of the object being
modified. Other files too. (Only partially fixed.)
(*) tkinter dereferences NULL if timer callback raises an exception
(*) must link with -lieee for linux
(*) if a timer handler routine raises an exception, the interpreter
dereferences NULL
(*) __getattr__ doesn't clear error
(*) '%s' % a, where a is a class instance, fails
(*) "make test" won't find freshly built dynamically loaded modules --
should add ./Modules to TESTPATH
(*) lshift calls __rshift__ instead of __rlshift__
(*) memory leak in creation of sys.builtin_module_names
(*) Bugs in instance_dealloc(): (a) memory leak for exception
type+value; (2) should save+restore traceback as well
(*) modsupport.c(vmkvalue): on systems where va_list is an array, the
calls to do_mkvalue and do_mktuple don't want an "&" before va.
======================================================================
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BUGS found in 1.1 and fixed in 1.1.1
------------------------------------
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(*) printing name of lambda in traceback dereferences NULL
(*) A built-in function using getargs() and expecting >= 1 argument
may dump core when called without arguments
(*) newgetargs() dumps core in compat mode when NULL is passed in but
max is >0
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(*) pow() should be declared varargs since it uses newgetargs
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(*) newmodule.c doesn't compile on SunOS 4.1.3 due to non-K&R backslashes
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(*) some typos in tut.tex
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(*) test for broken static forward is not strong enough
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(*) Doc/Makefile assumes . is in $PATH in call to whichlibs
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(*) math module misses hypot() function
(*) structmember.h should include stddef.h (for offsetof macro)
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(*) gdbmmodule.c frees the wrong structures
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(*) makesetup script misses some dollars and backslashes
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(*) getargs.obj missing from NT makefile
(*) sorting class instances broken if no __cmp__ defined
======================================================================
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BUGS found in 1.0.3 and fixed in 1.1
------------------------------------
(*) 2 specific leaks: 1 PYTHONPATH; 2 reading code from .pyc
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(*) If class C doesn't define __cmp__, cmp(a,b) will return -2 and
[a,b].sort() will fail
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(*) Syntax errors are reported in a silly way if multi-line tokens are
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involved.
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(*) SyntaxError exception for compile('...') are reported wrongly
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(lineno is always zero and offset is offset into the whole string).
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(*) freeze script needs major rewrite to cope with multiple extensions
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(Jack seems to have fixed it now -- where is it?)
(*) unwanted entries in stack trace if err_clear() clears an error
that also set a stack trace
(*) i, x[i] = a, b assigns b to x[a] rather than to x[i] as expected
(documented with a warning in ref6.tex!)
(*) etags no longer supports -t flag
(*) compile.c:com_argdefs() references unalloc'ed memory for def
f(a=1,): ...
(*) If you have a python binary in your path like
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/ufs/guido/bin/sgi/python then the default prefix option computed by
the configure script is bogus!
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(*) Make rule for making lib*.a should remove the lib*.a file first.
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(*) vars() error message is wrong (copied from dir() obviously).
(*) socket.gethostname() is undocumented.
(*) rfc822.py: getfirst* dies when multiple headers occur
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(*) urllib caching is wrong (should use date from Expires header)
(*) On a related matter: regexpr.c still has two malloc()s the results
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of which are not tested for being NULL (lines 1253 and 1530). There
are also some in rgbimagemodule.c. Am I overlooking something or is
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this a crasher?
(*) strop.rindex('abc', '') returns 0 instead of 3
(*) sunaudiodevmodule.o is too long!
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(*) toplevel README needs new text on PC and Mac builds
(*) long(0x80000000) has wrong value!
======================================================================
Bugs found in 1.0.2 and not yet fixed
-------------------------------------
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(?) compiler warnings about argument type of uname() on ULTRIX
machines (don't know what to do about it)
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(?) syntax error for interactive input prints garbage instead of last
source line on some systems (e.g. AIX) (impossible to test/reproduce)
!!! I think I've found this one -- a missing INCREF in print_error!
(?) (maybe) a bad .pyc file (with old magic number) causes the .py
file to be ignored
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(?) Sunos4.0.2 / 386 configure bugs:
- timelocal instead of mktime
- unistd.h doesn't declare some functions
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(don't know what to do about this)
Bugs found in 1.0.2 and fixed in 1.0.3
--------------------------------------
(*) nasty bug in string formatting (see test_types.py, search for %)
(*) if a triple-quoted string ends in a quote followed by a newline
(followed immediately by the terminating 3 quotes) then a syntax error
or system error ensues
(*) bug in socket.listen: clipping backlog to >= 1 doesn't work
(*) two bogus XDEL's in Modules/regexmodule.reg_dealloc()
(*) Parser/myreadline.my_fgets: #endif EINTR misplaced
(*) new IP address for ftp.cwi.nl !!!
(*) typing vars() to interactive prompt runs into infinite loop
because of '_'
(*) tokenizer/tok_nextc() runs into infinite loop when file does not
end in linefeed
(*) Sunos4.0.2 / 386 configure bugs:
(*) - use size_t at some places without including sys/types.h
(*) - missing clock_t
(*) - uses SEEK_SET in some places that don't include unistd.h
======================================================================
Bugs found in 1.0.1 and not yet fixed
-------------------------------------
(?) threads are slow on Solaris 2
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(so what?)
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(*) threads cause myreadline.c's readline() to think it sees an EOF.
(I *think* I've fixed this, by testing for EINTR)
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(?) min() on PC version generates wrong result (i.e. same as max())
[this happens on SoftPC -- don't know about other systems]
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(can't find the reason -- may be SoftPC bug)
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(*) flp.py cache bug: if the cache only contains one form, asking for
all forms returns only the cached form
Bugs found in 1.0.1 and fixed in 1.0.2
--------------------------------------
(*) core dump when parser.parsefile() called
(*) man page contains a mess before -d option
(*) threads don't work on IRIX 4
(*) wrong cast of svideo_getattr in svmodule.c
(*) bad return value in runpython.c's run_tty_1()
(*) creating dict of 100,000 objects gets MemoryError or dumps core
(*) freeze script doesn't work
======================================================================
BUGS found in 1.0.0 and not yet fixed
-------------------------------------
(?) On NeXT, need to define _POSIX_SOURCE.
(?) there appears to be something wrong with gcc and -ldl on some
SunOS 4.1.3 systems
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(?) jredfords reports core dump with float literals
BUGS found in 1.0.0 and fixed in 1.0.1
--------------------------------------
(*) On SGI IRIX 4 using cc, compilation errors in md5module.c.
(*) In cdmodule.c, getattr initialized with (destructor)!
(*) Lib/tzparse.py runs test() on import
(*) Lib/filewin.py belongs in Lib/stdwin
(*) lib and man install targets don't use $(srcdir)
(*) Modules/rgbimgmodule.c: exception name contains comma instead of dot
(*) The FAQ still references misc/EXTENDING and misc/DYNLOAD etc
(*) The FAQ still describes how to work around a problem in 0.9.9 exec()
(*) Lib/aifc.py, returns float rate, should be int
(*) Lib/sunau.py, incorrectly cumputes byte count from frame rate
(*) README should mention possibility of passing OPT=-g to make
(*) dynamic loading on sunos 4.1.3 must call dlopen(..., 1)
(*) use of <varargs.h> vs. <stdarg.h> should depend on
HAVE_STDARG_PROTOTYPES, not on HAVE_STDARG_H
(*) Doc/README refers to Misc/FTP which in fact does not exist any more
(*) filter(None, 'abcdefg') dumps core
(*) once you interrupt time.sleep(), there is no interrupt handler!
======================================================================
end of file