From octave-maintainers-request at bevo dot che dot wisc dot edu  Tue Nov 12 04:23:17 1996
Subject: Error message does not make any sense
From: Andreas Weingessel <weingessel at ci dot tuwien dot ac dot at>
To: octave-maintainers at bevo dot che dot wisc dot edu
Date: Tue, 12 Nov 1996 11:27:31 +0100

To: octave-maintainers at bevo dot che dot wisc dot edu
Subject: Error message

Bug report for Octave 1.91 configured for i586-unknown-linux

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

When using a vector or matrix index which is NaN, octave gives an
error message like

error: invalid vector index = -2147483648
error: evaluating index expression near line 11, column 1

So, if for example the following lines are part of an m-File

[dis pos]=min(a);
c=b(pos);

and the vector grows for some reason out of bounds, the program
terminates with the above error message which does not give any clue
what has been the real reason for the error.

Repeat-By:
---------

octave:7> a=rand(1,5)
a =

  0.20286  0.69216  0.29748  0.33870  0.10974

octave:8> b=rand(1,5)
b =

  0.40447  0.48739  0.92516  0.45729  0.87664

octave:9> a(1)=NaN
a =

      NaN  0.69216  0.29748  0.33870  0.10974

octave:10> [dis pos]=min(a)
dis = NaN

pos = NaN

octave:11> b(pos)
error: invalid vector index = -2147483648
error: evaluating index expression near line 11, column 1



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

uname output:     Linux elendil 2.0.13 #1 Wed Aug 28 14:31:14 MET DST 1996 i586
configure opts:   --datadir=/usr/local/lib --libexecdir=/usr/local/lib --enable-shared
Fortran compiler: g77
FFLAGS:           -O
F2C:              
F2CFLAGS:         
FLIBS:            -lf2c -L/usr/lib/gcc-lib/i486-linux/2.7.2 -lgcc
CPPFLAGS:         
INCFLAGS:         -I/usr/local/include -I/usr/local/include/octave-1.91
C compiler:       gcc, version 2.7.2
CFLAGS:           -DHAVE_CONFIG_H -mieee-fp -O
CPICFLAG:         -fPIC
C++ compiler:     c++, version 2.7.2
CXXFLAGS:         -DHAVE_CONFIG_H  -fno-implicit-templates -mieee-fp -O
CXXPICFLAG:       -fPIC
LDFLAGS:          -s
LIBFLAGS:         -L/usr/local/lib
RLD_FLAG:         
CXXLIBS:          -lstdc++ -lm -L/usr/lib/gcc-lib/i486-linux/2.7.2 -lstdc++ -lm -lgcc -lc -lgcc
TERMLIBS:         -lncurses
LIBS:             
LEXLIB:           
LIBPLPLOT:        
LIBDLFCN:         
DEFS:

  -DOCTAVE_SOURCE=1 -DSEPCHAR=':' -DSEPCHAR_STR=":" -DUSE_GNU_INFO=1
  -DUSE_READLINE=1 -DSIZEOF_SHORT=2 -DSIZEOF_INT=4 -DSIZEOF_LONG=4
  -DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 -DF77_APPEND_UNDERSCORE=1
  -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_FCNTL_H=1 -DHAVE_FLOAT_H=1 -DHAVE_GRP_H=1 -DHAVE_LIMITS_H=1
  -DHAVE_MEMORY_H=1 -DHAVE_PWD_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
  -DHAVE_SYS_PARAM_H=1 -DHAVE_SYS_RESOURCE_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 -DNPSOL_MISSING=1
  -DQPSOL_MISSING=1 -DFSQP_MISSING=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_GETUID=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_VFPRINTF=1
  -DHAVE_VSPRINTF=1 -DHAVE_WAITPID=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_TZNAME=1 -DRETSIGTYPE=void -DSYS_SIGLIST_DECLARED=1
  -DHAVE_SYS_SIGLIST=1 -DHAVE_POSIX_SIGNALS=1 -DHAVE_GETRUSAGE=1
  -DHAVE_TIMES=1 -DGNUPLOT_HAS_MULTIPLOT=1 -DGNUPLOT_HAS_FRAMES=1

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

  EDITOR = "vi"
  IMAGEPATH = ".:/usr/local/lib/octave/1.91/imagelib//"
  INFO_FILE = "/usr/local/info/octave.info"
  LOADPATH = ".:~/lib/octave/m//:~/Work/octave/m//.:/usr/local/lib/octave/site/oct/i586-unknown-linux//:/usr/local/lib/octave/site/m//:/usr/local/lib/octave/1.91/oct/i586-unknown-linux//:/usr/local/lib/octave/1.91/m//"
  OCTAVE_VERSION = "1.91"
  PAGER = "less"
  PS1 = "\\s:\\#> "
  PS2 = "> "
  automatic_replot = 0
  whitespace_in_literal_matrix = 0
  default_save_format = "mat-binary"
  do_fortran_indexing = 1
  empty_list_elements_ok = 1
  eps = 2.22045e-16
  gnuplot_binary = "gnuplot"
  ignore_function_time_stamp = "system"
  implicit_str_to_num_ok = 1
  ok_to_lose_imaginary_part = 1
  output_max_field_width = 10
  output_precision = 5
  page_screen_output = 1
  prefer_column_vectors = 0
  prefer_zero_one_indexing = 1
  print_answer_id_name = 1
  print_empty_dimensions = 0
  propagate_empty_matrices = 1
  resize_on_range_error = 1
  return_last_computed_value = 0
  save_precision = 4
  silent_functions = 0
  split_long_rows = 1
  treat_neg_dim_as_zero = 1
  warn_assign_as_truth_value = 1
  warn_comma_in_global_decl = 1
  warn_divide_by_zero = 1