Anonymous functions can't be created inside other anonymous functions

Adam Reeve adreeve at gmail.com
Thu Dec 18 02:19:16 CST 2008


Bug report for Octave 3.0.1 configured for i486-pc-linux-gnu

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

Octave gives the error that a function is undefined when trying to 
create an anonymous function in a function
that has been called via an anonymous function handle. I am using Octave 
3.0.1-6ubuntu1 on Ubuntu 8.10.

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

function x = test
    b = 1;
    myfunc = @(a) myadd (a, b);
    myfunc(2)                       % This works

    [t, x] = ode45(@compute_rate, [0,10], [1.0]);
end

function dx = compute_rate(x)
    b = x/2;
    myfunc = @(a) myadd (a, b);     % This doesn't
    dx = myfunc(x/2);
end

function c = myadd (a, b)
    c = a + b;
end

Output:
error: `myadd' undefined near line 11 column 19
error: called from `?unknown?'
error: evaluating assignment expression near line 12, column 8
error: called from `test:compute_rate' in file 
`/home/adam/summerproject/models/test.m'
error: evaluating assignment expression near line 322, column 17
error: evaluating if command near line 311, column 7
error: evaluating for command near line 308, column 5
error: evaluating while command near line 301, column 3
error: called from `ode45' in file 
`/usr/share/octave/packages/odepkg-0.6.0/ode45.m'
error: called from `test' in file `test.m'


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

uname output:     Linux adam-desktop 2.6.27-9-generic #1 SMP Thu Nov 20 
21:57:00 UTC 2008 i686 GNU/Linux
configure opts:   '--host=i486-linux-gnu' '--build=i486-linux-gnu' 
'--prefix=/usr' '--datadir=/usr/share' '--libdir=/usr/lib' 
'--libexecdir=/usr/lib' '--infodir=/usr/share/info' 
'--mandir=/usr/share/man' '--with-blas=-lblas-3gf' 
'--with-lapack=-llapackgf-3' '--with-hdf5' '--with-fftw' 
'--enable-shared' '--enable-rpath' '--disable-static' 
'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CC=gcc' 
'CFLAGS=-g -O2' 'LDFLAGS=-Wl,-Bsymbolic-functions' 'CPPFLAGS=' 'CXX=g++' 
'CXXFLAGS=-g -O2' 'F77=gfortran' 'FFLAGS=-g -O2'
Fortran compiler: gfortran
FFLAGS:           -O2 -g
F2C:              @F2C@
F2CFLAGS:         @F2CFLAGS@
FLIBS:            -L/usr/lib/gcc/i486-linux-gnu/4.3.1 
-L/usr/lib/gcc/i486-linux-gnu/4.3.1/../../../../lib -L/lib/../lib 
-L/usr/lib/../lib -L/usr/lib/gcc/i486-linux-gnu/4.3.1/../../.. -lhdf5 
-lz -lgfortranbegin -lgfortran -lm
CPPFLAGS:         
INCFLAGS:         -I. -I. -I./liboctave -I./src -I./libcruft/misc
C compiler:       gcc, version 4.3.1 (Ubuntu 4.3.1-8ubuntu3)
CFLAGS:           -O2 -g
CPICFLAG:         -fPIC
C++ compiler:     g++, version 4.3.1
CXXFLAGS:         -O2 -g
CXXPICFLAG:       -fPIC
LD_CXX:           g++
LDFLAGS:          
LIBFLAGS:         -L.
RLD_FLAG:         -Wl,-rpath -Wl,/usr/lib/octave-3.0.1
BLAS_LIBS:        -llapackgf-3 -lblas-3gf
FFTW_LIBS:        -lfftw3
LIBS:             -lreadline  -lncurses -ldl -lhdf5 -lz -lm
LEXLIB:           
LIBGLOB:          
SED:              /bin/sed
DEFS:

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  -DHAVE_DLSYM=1 -DHAVE_DLERROR=1 -DHAVE_DLCLOSE=1 -DHAVE_DLOPEN_API=1
  -DENABLE_DYNAMIC_LINKING=1 -DHAVE_TIMEVAL=1 -DHAVE_FINITE=1
  -DHAVE_ISNAN=1 -DHAVE_ISINF=1 -DHAVE_COPYSIGN=1 -DHAVE_DECL_SIGNBIT=1
  -DHAVE_ACOSH=1 -DHAVE_ASINH=1 -DHAVE_ATANH=1 -DHAVE_ERF=1 -DHAVE_ERFC=1
  -DHAVE_EXP2=1 -DHAVE_LOG2=1 -DHAVE_STRUCT_STAT_ST_BLKSIZE=1
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  -DHAVE_TIMES=1 -DYYTEXT_POINTER=1 -DGNUPLOT_BINARY="gnuplot"

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

  EDITOR = emacs
  EXEC_PATH = 
/usr/lib/octave/3.0.1/site/exec/i486-pc-linux-gnu:/usr/lib/octave/api-v32/site/exec/i486-pc-linux-gnu:/usr/lib/octave/site/exec/i486-pc-linux-gnu:/usr/lib/octave/3.0.1/exec/i486-pc-linux-gnu:/usr/bin:/home/adam/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
  IMAGE_PATH = .:/usr/share/octave/3.0.1/imagelib
  PAGER = pager
  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 =

  gnuplot_command_plot = pl
  gnuplot_command_replot = rep
  gnuplot_command_splot = sp
  gnuplot_command_title = t
  gnuplot_command_using = u
  gnuplot_command_with = w
  history_file = /home/adam/.octave_hist
  history_size = 1024
  ignore_function_time_stamp = system
  info_file = /usr/share/info/octave3.0.info
  info_program = info
  makeinfo_program = makeinfo
  max_recursion_depth = 256
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  silent_functions = 0
  split_long_rows = 1
  string_fill_char =  
  struct_levels_to_print = 2
  suppress_verbose_help_message = 0


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