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Unidentified subject!
From: |
Alex Stark |
Subject: |
Unidentified subject! |
Date: |
Fri, 25 Jun 1999 11:51:28 -0400 |
To: address@hidden
Cc: stark
Subject: Simple (?) recursive printing seg fault
Bug report for Octave 2.0.13.90 configured for i386-redhat-linux-gnu
Description:
-----------
* A fairly straightforward recursive procedure for printing a
recursive data structure (binary tree) has given me a segmentation
fault. It should be self-explanatory otherwise.
Repeat-By:
---------
(This may be caused by the warnings. I am trying to find out how to
switch this off..., or I can wait an hour until the server/desktop
daylight saving mismatch is avoided. Note therefore, that my computer
thinks that treeprnt `was' written an hour in the future.)
Note: it is possible that you would get a different output if the
random number generator changes. For this a and b(a) as shown below,
the output string should, I think, be
`(((((7,5),1),2),(8,3)),(6,4))'
if I have the code right. (But it shouldn't crash.)
I enclose a transcript, including some Redhat rpm information, and the
two files below:
---------------------Transcript
octave:1> rand('seed',0);[a b]=treegen(8);[a b(a)],treeprnt(a,b, 15,2)
ans =
6 4
7 5
8 3
10 1
12 2
13 11
14 9
warning: time stamp for `/mnt/niss/phylo/bambe/protease/treegen.m' is in the
future
warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
(warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
(warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
(warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
(warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
(warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
7,warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
5),warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in
the future
1),warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in
the future
2),warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in
the future
(warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
8,warning: time stamp for `/mnt/niss/phylo/bambe/protease/treeprnt.m' is in the
future
3))error: Segmentation fault -- stopping myself...
attempting to save variables to `octave-core'...
error: attempted clean up apparently failed -- aborting...
Abort
[protease]$ rpm -qi octave
Name : octave Distribution: PowerTools
Version : 2.0.13.90 Vendor: Red Hat Software
Release : 1 Build Date: Mon Oct 26 22:59:48 1998
Install date: Tue Mar 23 11:33:43 1999 Build Host: porky.redhat.com
Group : Applications/Math Source RPM:
octave-2.0.13.90-1.src.rpm
Size : 13260135 License: GPL
Packager : Red Hat Software <address@hidden>
---------------------treegen.m
function [nodelist, pairings] = treegen(k, choicelist)
% usage: [nodelist, pairings] = treegen(k, choicelist)
% [nodelist, pairings] = treegen(k)
%
% Generate a tree in node/leaf-pair format either randomly
% or using a list of choices.
%
% k is the number of leaves
% choicelist is a vector of numbers,
% the 1st containing 1
% the 2nd from 1 to 3
% the 3rd from 1 to 5
% ...
% the last from 1 to 2k-3
% This can be used to exhaustively generate trees.
% If not given, choicelist is randomly generated
%
% pairings say which node/leaf is paired with each other node/leaf
% (sibling pairs, that is)
%
% nodelist says which is the largest-numbered child node/leaf for
% nodes k+1 through 2k-1
%
% J Alex Stark, NISS, 1999-06-25
if (nargin<2)
choicelist = ceil(rand(k-1,1).*(1:2:2*k-3)');
end
NN=2*(k-1);
remlist=(1:NN)';
pairings=-remlist; % -ve means index into remlist
for i=NN:-2:2
l=remlist(i);
choice = remlist(choicelist(i/2));
% Remove node choice from remlist (node l is just discarded)
locrem=-pairings(choice);
switchnode = remlist(i-1);
remlist(locrem)=switchnode;
pairings(switchnode)=-locrem;
pairings(l)=choice;
pairings(choice)=l;
end
remlist = remlist*0;
nodelist=zeros(k-1,1);
l=NN;
for i=k-1:-1:1
while (remlist(l)>0)
l=l-1;
end
%printf('(%g,%g)\n', l, pairings(l));
nodelist(i)=l;
remlist(l)=1;
remlist(pairings(l))=1;
end
%[nodelist pairings(nodelist)]
---------------------treeprnt.m
function treeprnt(nodelist, pairings, j, FILEH)
% usage: treeprnt(nodelist, pairings, j, FILEH)
% treeprnt(nodelist, pairings, j)
%
% Print a tree in nodelist-pairings format (for which, see
% treegen.m), starting at node j. This calls itself recursively:
% for the whole tree use j=2k-1, where k is the number of leaves.
% The tree is printed to standard output if no file handle is
% given.
%
% J Alex Stark, NISS, 1999-06-25
if (nargin<4)
FILEH = 1;
end
k=length(nodelist)+1;
if (j<=k)
fprintf(FILEH,'%g',j);
else
fprintf(FILEH,'(');
treeprnt(nodelist, pairings, nodelist(j-k), FILEH);
fprintf(FILEH,',');
treeprnt(nodelist, pairings, pairings(nodelist(j-k)), FILEH);
fprintf(FILEH,')');
end
---------------------
Configuration (please do not edit this section):
-----------------------------------------------
uname output: Linux pc14.niss.org 2.0.36 #1 Tue Oct 13 22:17:11 EDT 1998
i686 unknown
configure opts: --prefix=/usr --with-g77 --enable-dl --enable-shared
--enable-rpath --enable-lite-kernel --enable-picky-flags i386-redhat-linux
Fortran compiler: g77
FFLAGS: -O
F2C:
F2CFLAGS:
FLIBS: -L/usr/lib/gcc-lib/i386-redhat-linux/egcs-2.90.29
-L/usr/i386-redhat-linux/lib -lf2c -lm
CPPFLAGS:
INCFLAGS: -I/usr/include -I/usr/include/octave-2.0.13.90
C compiler: gcc, version 2.7.2.3
CFLAGS: -DHAVE_CONFIG_H -mieee-fp -O2 -m486 -fno-strength-reduce
CPICFLAG: -fPIC
C++ compiler: c++, version 2.90.29 980515 (egcs-1.0.3 release)
CXXFLAGS: -DHAVE_CONFIG_H -mieee-fp -fno-rtti -fno-exceptions
-fno-implicit-templates -O2 -m486 -fno-strength-reduce
CXXPICFLAG: -fPIC
LDFLAGS: -g
LIBFLAGS: -L/usr/lib/octave-2.0.13.90
RLD_FLAG: -Xlinker -rpath -Xlinker /usr/lib/octave-2.0.13.90
TERMLIBS: -lncurses
LIBS:
LEXLIB:
LIBPLPLOT:
LIBDLFCN:
DEFS:
-DOCTAVE_SOURCE=1 -DSEPCHAR=':' -DSEPCHAR_STR=":" -DUSE_READLINE=1
-DCXX_NEW_FRIEND_TEMPLATE_DECL=1 -DF77_APPEND_UNDERSCORE=1 -DOCTAVE_LITE=1
-DSIZEOF_SHORT=2 -DSIZEOF_INT=4 -DSIZEOF_LONG=4 -DHAVE_ALLOCA_H=1
-DHAVE_ALLOCA=1 -DNPOS=string::npos -DSTDC_HEADERS=1 -DHAVE_DIRENT_H=1
-DTIME_WITH_SYS_TIME=1 -DHAVE_SYS_WAIT_H=1 -DHAVE_ASSERT_H=1
-DHAVE_CURSES_H=1 -DHAVE_DLFCN_H=1 -DHAVE_FCNTL_H=1 -DHAVE_FLOAT_H=1
-DHAVE_FNMATCH_H=1 -DHAVE_GLOB_H=1 -DHAVE_GRP_H=1 -DHAVE_LIMITS_H=1
-DHAVE_MEMORY_H=1 -DHAVE_NAN_H=1 -DHAVE_NCURSES_H=1 -DHAVE_PWD_H=1
-DHAVE_SGTTY_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_SYS_PARAM_H=1
-DHAVE_SYS_RESOURCE_H=1 -DHAVE_SYS_SELECT_H=1 -DHAVE_SYS_STAT_H=1
-DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TIMES_H=1 -DHAVE_SYS_TYPES_H=1
-DHAVE_SYS_UTSNAME_H=1 -DHAVE_TERMCAP_H=1 -DHAVE_TERMIO_H=1
-DHAVE_TERMIOS_H=1 -DHAVE_UNISTD_H=1 -DHAVE_VARARGS_H=1 -DHAVE_ATEXIT=1
-DHAVE_BCOPY=1 -DHAVE_BZERO=1 -DHAVE_DUP2=1 -DHAVE_ENDGRENT=1
-DHAVE_ENDPWENT=1 -DHAVE_EXECVP=1 -DHAVE_FCNTL=1 -DHAVE_FORK=1
-DHAVE_GETCWD=1 -DHAVE_GETEGID=1 -DHAVE_GETEUID=1 -DHAVE_GETGID=1
-DHAVE_GETGRENT=1 -DHAVE_GETGRGID=1 -DHAVE_GETGRNAM=1 -DHAVE_GETHOSTNAME=1
-DHAVE_GETPGRP=1 -DHAVE_GETPID=1 -DHAVE_GETPPID=1 -DHAVE_GETPWENT=1
-DHAVE_GETPWNAM=1 -DHAVE_GETPWUID=1 -DHAVE_GETTIMEOFDAY=1
-DHAVE_GETUID=1 -DHAVE_GETWD=1 -DHAVE_LSTAT=1 -DHAVE_MEMMOVE=1
-DHAVE_MKDIR=1 -DHAVE_MKFIFO=1 -DHAVE_ON_EXIT=1 -DHAVE_PIPE=1
-DHAVE_PUTENV=1 -DHAVE_RENAME=1 -DHAVE_RINDEX=1 -DHAVE_RMDIR=1
-DHAVE_SETGRENT=1 -DHAVE_SETPWENT=1 -DHAVE_SETVBUF=1 -DHAVE_SIGACTION=1
-DHAVE_SIGPENDING=1 -DHAVE_SIGPROCMASK=1 -DHAVE_SIGSUSPEND=1
-DHAVE_STAT=1 -DHAVE_STRCASECMP=1 -DHAVE_STRDUP=1 -DHAVE_STRERROR=1
-DHAVE_STRNCASECMP=1 -DHAVE_TEMPNAM=1 -DHAVE_UMASK=1 -DHAVE_UNLINK=1
-DHAVE_USLEEP=1 -DHAVE_VFPRINTF=1 -DHAVE_VSPRINTF=1 -DHAVE_WAITPID=1
-DSMART_PUTENV=1 -DHAVE_PROGRAM_INVOCATION_NAME=1 -DHAVE_LIBDL=1
-DHAVE_DLOPEN=1 -DHAVE_DLSYM=1 -DHAVE_DLERROR=1 -DHAVE_DLCLOSE=1
-DWITH_DL=1 -DWITH_DYNAMIC_LINKING=1 -DHAVE_LIBM=1 -DHAVE_FINITE=1
-DHAVE_ISNAN=1 -DHAVE_ISINF=1 -DHAVE_ACOSH=1 -DHAVE_ASINH=1 -DHAVE_ATANH=1
-DHAVE_ERF=1 -DHAVE_ERFC=1 -DHAVE_ST_BLKSIZE=1 -DHAVE_ST_BLOCKS=1
-DHAVE_ST_RDEV=1 -DHAVE_TM_ZONE=1 -DHAVE_GR_PASSWD=1 -DEXCEPTION_IN_MATH=1
-DRETSIGTYPE=void -DSYS_SIGLIST_DECLARED=1 -DHAVE_SYS_SIGLIST=1
-DHAVE_POSIX_SIGNALS=1 -DHAVE_GETRUSAGE=1 -DHAVE_TIMES=1
User-preferences (please do not edit this section):
--------------------------------------------------
EDITOR = "emacs"
EXEC_PATH =
":/home/stark/local/bin:/home/stark/devel/bin:/home/stark/rpmlocal/bin:/home/stark/local/bin:/home/stark/devel/bin:/home/stark/rpmlocal/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:.:/usr/X11R6/bin:."
IMAGEPATH = ".:/usr/share/octave/2.0.13.90/imagelib//"
INFO_FILE = "/usr/info/octave.info"
INFO_PROGRAM = "info"
LOADPATH =
".:/usr/libexec/octave/site/oct/i386-redhat-linux-gnu//:/usr/share/octave/site/m//:/usr/libexec/octave/2.0.13.90/oct/i386-redhat-linux-gnu//:/usr/share/octave/2.0.13.90/m//"
PAGER = "less"
PS1 = "\\s:\\#> "
PS2 = "> "
PS4 = "+ "
auto_unload_dot_oct_files = 0
automatic_replot = 0
beep_on_error = 0
completion_append_char = " "
default_eval_print_flag = 1
# default_global_variable_value = <no value or error in displaying it>
default_return_value = []
default_save_format = "ascii"
define_all_return_values = 0
do_fortran_indexing = 0
echo_executing_commands = 0
empty_list_elements_ok = "warn"
fixed_point_format = 0
gnuplot_binary = "gnuplot"
gnuplot_has_frames = 0
gnuplot_has_multiplot = 0
history_file = "/home/stark/.octave_hist"
history_size = 1024
ignore_function_time_stamp = "system"
implicit_num_to_str_ok = 0
implicit_str_to_num_ok = 0
initialize_global_variables = 0
max_recursion_depth = 256
ok_to_lose_imaginary_part = "warn"
output_max_field_width = 10
output_precision = 5
page_output_immediately = 0
page_screen_output = 1
prefer_column_vectors = 1
prefer_zero_one_indexing = 0
print_answer_id_name = 1
print_empty_dimensions = 1
propagate_empty_matrices = 1
resize_on_range_error = 1
return_last_computed_value = 0
save_precision = 15
saving_history = 1
silent_functions = 0
split_long_rows = 1
string_fill_char = " "
struct_levels_to_print = 2
suppress_verbose_help_message = 0
treat_neg_dim_as_zero = 0
warn_assign_as_truth_value = 1
warn_comma_in_global_decl = 1
warn_divide_by_zero = 1
warn_function_name_clash = 1
warn_missing_semicolon = 0
warn_reload_forces_clear = 1
warn_variable_switch_label = 0
whitespace_in_literal_matrix =
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