[Octave-bug-tracker] [bug #32408] segfault when sourcing function files that contain subfunctions

[John W. Eaton]

URL:
  <http://savannah.gnu.org/bugs/?32408>

                 Summary: segfault when sourcing function files that contain
subfunctions
                 Project: GNU Octave
            Submitted by: jwe
            Submitted on: Thu 10 Feb 2011 08:29:50 AM GMT
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

Given the following function with subfunctions in foo.m:


function foo ()
  sub1 ();

function sub1 ()
  disp ('foo>sub1');
  sub2 ();

function sub2 ()
  disp ('foo>sub2');


executing


source ("foo.m")
source ("foo.m")


will cause Octave to segfault on the second call to source.

GDB backtrace:


#0  0x0000000000000000 in ?? ()
#1  0x00007ffff705ba0f in ~octave_value (this=0x7fffffffc170, 
    __in_chrg=<value optimized out>) at /home/jwe/src/octave/src/ov.h:310
#2  0x00007ffff730b915 in finish_function (ret_list=0x0, fcn=0x6ab1e8,
lc=0x0)
    at oct-parse.yy:2957
#3  0x00007ffff7306dfc in octave_parse () at oct-parse.yy:1365
#4  0x00007ffff730cff1 in parse_fcn_file (ff=..., dispatch_type=..., 
    force_script=true, require_file=true, warn_for=...) at oct-parse.yy:3586
#5  0x00007ffff730f291 in source_file (file_name=..., context=..., 
    verbose=false, require_file=true, warn_for=...) at oct-parse.yy:3992
#6  0x00007ffff730fb8d in Fsource (args=...) at oct-parse.yy:4114
#7  0x00007ffff742935d in octave_builtin::do_multi_index_op (this=0x766530, 
    nargout=0, args=..., lvalue_list=0x0)
    at /home/jwe/src/octave/src/ov-builtin.cc:128
#8  0x00007ffff7429031 in octave_builtin::subsref (this=0x766530, type=..., 
    idx=..., nargout=0, lvalue_list=0x0)
    at /home/jwe/src/octave/src/ov-builtin.cc:63
#9  0x00007ffff7428f1d in octave_builtin::subsref (this=0x766530, type=..., 
    idx=..., nargout=0) at /home/jwe/src/octave/src/ov-builtin.cc:46
#10 0x00007ffff74cddea in octave_value::subsref (this=0x7fffffffd270, 
    type=..., idx=..., nargout=0) at /home/jwe/src/octave/src/ov.cc:1201
#11 0x00007ffff74cde78 in octave_value::subsref (this=0x7fffffffd270, 
    type=..., idx=..., nargout=0, lvalue_list=0x0)
    at /home/jwe/src/octave/src/ov.cc:1212
#12 0x00007ffff7560c26 in tree_index_expression::rvalue (this=0x9f0170, 
    nargout=0, lvalue_list=0x0) at /home/jwe/src/octave/src/pt-idx.cc:407
#13 0x00007ffff75601dc in tree_index_expression::rvalue (this=0x9f0170, 
    nargout=0) at /home/jwe/src/octave/src/pt-idx.cc:277
#14 0x00007ffff7560dc6 in tree_index_expression::rvalue1 (this=0x9f0170, 
    nargout=0) at /home/jwe/src/octave/src/pt-idx.cc:418
#15 0x00007ffff755a411 in tree_evaluator::visit_statement (
    this=0x7ffff7ddd9f8, stmt=...) at
/home/jwe/src/octave/src/pt-eval.cc:737
#16 0x00007ffff75789b0 in tree_statement::accept (this=0xc8ef80, tw=...)
    at /home/jwe/src/octave/src/pt-stmt.cc:151
#17 0x00007ffff755a5fe in tree_evaluator::visit_statement_list (
    this=0x7ffff7ddd9f8, lst=...) at /home/jwe/src/octave/src/pt-eval.cc:773
#18 0x00007ffff7578d62 in tree_statement_list::accept (this=0xc90070,
tw=...)
    at /home/jwe/src/octave/src/pt-stmt.cc:215
#19 0x00007ffff73c87f4 in main_loop ()
    at /home/jwe/src/octave/src/toplev.cc:573
#20 0x00007ffff7380eb8 in octave_main (argc=6, argv=0x7fffffffd9e8,
embedded=0)
    at /home/jwe/src/octave/src/octave.cc:935
#21 0x00000000004008a9 in main (argc=6, argv=0x7fffffffd9e8)
    at /home/jwe/src/octave/src/main.c:35






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