Format rat and "-1"

Eduardo Garcia garcia25 at purdue.edu
Mon Jun 29 17:54:39 CDT 2009 

Cc: Eduardo Garcia
--------
Bug report for Octave 3.2.0 configured for i386-apple-darwin8.11.1

Description:
-----------

   When using "format rat" sometimes "-2147483648/-2147483648" is  
displayed instead of "-1".
   (Same bug is present in Octave 3.0.5 configured for i386-apple- 
darwin8.9.1)

Repeat-By:
---------
BUG:
octave-3.2.0:23> a=[1 2;3 5]
octave-3.2.0:24> det(a)
ans = -1.0000
octave-3.2.0:25> format rat
octave-3.2.0:26> det(a)
ans = -2147483648/-2147483648

BUT:
octave-3.2.0:29> a=[1 2;1 1]
octave-3.2.0:30> format
octave-3.2.0:31> det(a)
ans = -1
octave-3.2.0:32> format rat
octave-3.2.0:33> det(a)
ans = -1

Fix:
---

?



Configuration (please do not edit this section):
-----------------------------------------------

uname output:     Darwin mlap4-67.math.purdue.edu 8.11.1 Darwin  
Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007;  
root:xnu-792.25.20~1/RELEASE_I386 i386 i386
configure opts:   'CC=gcc -arch i386' 'CPP=gcc -arch i386 -E' 'CXX=g+ 
+ -arch i386' 'F77=i386-apple-darwin8.11.1-g95' 'CFLAGS=-O3 -fforce- 
addr -march=i686 -mfpmath=sse,387 -mieee-fp -msse3 -msse2 -msse -mmmx  
-isysroot /Developer/SDKs/MacOSX10.4u.sdk -I/tmp/deps-i386/include'  
'CPPFLAGS=-O3 -fforce-addr -march=i686 -mfpmath=sse,387 -mieee-fp - 
msse3 -msse2 -msse -mmmx -isysroot /Developer/SDKs/MacOSX10.4u.sdk -I/ 
tmp/deps-i386/include' 'CXXFLAGS=-O3 -fforce-addr -march=i686 - 
mfpmath=sse,387 -mieee-fp -msse3 -msse2 -msse -mmmx -isysroot / 
Developer/SDKs/MacOSX10.4u.sdk -I/tmp/deps-i386/include' 'FFLAGS=-O3 - 
fforce-addr -march=i686 -mfpmath=sse,387 -mieee-fp -msse3 -msse2 - 
msse -mmmx -isysroot /Developer/SDKs/MacOSX10.4u.sdk -I/tmp/deps-i386/ 
include' 'FLIBS=' 'LDFLAGS=-L/tmp/deps-i386/lib -Wl,- 
headerpad_max_install_names   -Wl,-syslibroot -Wl,/Developer/SDKs/ 
MacOSX10.4u.sdk' '--prefix=/tmp/deps-i386' '--host=i386-apple- 
darwin8.11.1' '--without-x' '--enable-shared' '--disable-static'  
'host_alias=i386-apple-darwin8.11.1'
Fortran compiler: i386-apple-darwin8.11.1-g95
FFLAGS:           -O3 -fforce-addr -march=i686 -mfpmath=sse,387 - 
mieee-fp -msse3 -msse2 -msse -mmmx -isysroot /Developer/SDKs/ 
MacOSX10.4u.sdk -I/tmp/deps-i386/include -mieee-fp
FLIBS:            -L/tmp/deps-i386/lib -L/private/tmp/deps-i386/ 
bin/../lib/gcc-lib/i386-apple-darwin8.11.1/4.0.3/ -L/private/tmp/deps- 
i386/bin/../lib/gcc-lib/i386-apple-darwin8.11.1/4.0.3 -L/usr/lib/ 
gcc// -L/private/tmp/deps-i386/bin/../lib/gcc-lib/i386-apple- 
darwin8.11.1/4.0.3/// -L/usr/lib// -lhdf5 -lz -lf95 -lm -lSystemStubs  
-lmx
CPPFLAGS:         -O3 -fforce-addr -march=i686 -mfpmath=sse,387 - 
mieee-fp -msse3 -msse2 -msse -mmmx -isysroot /Developer/SDKs/ 
MacOSX10.4u.sdk -I/tmp/deps-i386/include -I/tmp/deps-i386/include
INCFLAGS:         -I. -I. -I./liboctave -I./src -I./libcruft/misc
C compiler:       gcc -arch i386, version 4.0.1 (Apple Computer, Inc.  
build 5370)
CFLAGS:           -O3 -fforce-addr -march=i686 -mfpmath=sse,387 - 
mieee-fp -msse3 -msse2 -msse -mmmx -isysroot /Developer/SDKs/ 
MacOSX10.4u.sdk -I/tmp/deps-i386/include
CPICFLAG:         -fPIC
C++ compiler:     g++ -arch i386, version 4.0.1
CXXFLAGS:         -O3 -fforce-addr -march=i686 -mfpmath=sse,387 - 
mieee-fp -msse3 -msse2 -msse -mmmx -isysroot /Developer/SDKs/ 
MacOSX10.4u.sdk -I/tmp/deps-i386/include
CXXPICFLAG:       -fPIC
LD_CXX:           g++ -arch i386
LDFLAGS:          -L/tmp/deps-i386/lib -Wl,- 
headerpad_max_install_names   -Wl,-syslibroot -Wl,/Developer/SDKs/ 
MacOSX10.4u.sdk
LIBFLAGS:         -L.
RLD_FLAG:
BLAS_LIBS:        -Wl,-framework -Wl,vecLib
FFTW_LIBS:        -lfftw3 -lfftw3f
LIBS:             -lreadline  -lncurses -Wl,-framework -Wl,vecLib - 
lhdf5 -lz -lm
LEXLIB:
LIBGLOB:
SED:              /usr/bin/sed
DEFS:

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DHAVE_SIGLONGJMP=1
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User-preferences (please do not edit this section):
--------------------------------------------------

   EDITOR = emacs
   EXEC_PATH = /Applications/Octave 3.2.0/Octave.app/Contents/ 
Resources/libexec/octave/3.2.0/site/exec/i386-apple-darwin8.11.1:/ 
Applications/Octave 3.2.0/Octave.app/Contents/Resources/libexec/ 
octave/api-v37/site/exec/i386-apple-darwin8.11.1:/Applications/Octave  
3.2.0/Octave.app/Contents/Resources/libexec/octave/site/exec/i386- 
apple-darwin8.11.1:/Applications/Octave 3.2.0/Octave.app/Contents/ 
Resources/libexec/octave/3.2.0/exec/i386-apple-darwin8.11.1:/ 
Applications/Octave 3.2.0/Octave.app/Contents/Resources/bin:/ 
Applications/Octave 3.2.0/Octave.app/Contents/Resources/bin:/Library/ 
Frameworks/Python.framework/Versions/Current/bin:/opt/subversion/bin:/ 
bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/texbin
   IMAGE_PATH = .:/Applications/Octave 3.2.0/Octave.app/Contents/ 
Resources/share/octave/3.2.0/imagelib
   PAGER = less
   PS1 = \s:\#>
   PS2 = >
   PS4 = +
   beep_on_error = 0
   completion_append_char =
   crash_dumps_octave_core = 1
   echo_executing_commands = 0
   fixed_point_format = 0
   gnuplot_binary = gnuplot
# gnuplot_command_end = <no value or error in displaying it>
# gnuplot_command_plot = <no value or error in displaying it>
# gnuplot_command_replot = <no value or error in displaying it>
# gnuplot_command_splot = <no value or error in displaying it>
# gnuplot_command_title = <no value or error in displaying it>
# gnuplot_command_using = <no value or error in displaying it>
# gnuplot_command_with = <no value or error in displaying it>
   history_file = /Users/viejolitico/.octave_hist
   history_size = 1024
   ignore_function_time_stamp = system
   info_file = /Applications/Octave 3.2.0/Octave.app/Contents/ 
Resources/share/info/octave.info
   info_program = info
   makeinfo_program = makeinfo
   max_recursion_depth = 256
   output_max_field_width = 5
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   page_output_immediately = 0
   page_screen_output = 1
# print_answer_id_name = <no value or error in displaying it>
   print_empty_dimensions = 1
   save_precision = 16
   saving_history = 1
   sighup_dumps_octave_core = 1
   sigterm_dumps_octave_core = 1
   silent_functions = 0
   split_long_rows = 1
   string_fill_char =
   struct_levels_to_print = 2
   suppress_verbose_help_message = 0

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