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[Octave-bug-tracker] [bug #47510] arrayfun errors on indexing diagonal m
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From: |
Rik |
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Subject: |
[Octave-bug-tracker] [bug #47510] arrayfun errors on indexing diagonal matrix |
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Date: |
Wed, 23 Mar 2016 20:34:25 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0 |
Update of bug #47510 (project octave):
Status: None => Confirmed
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Follow-up Comment #1:
Confirmed, although the code is really poorly written to do the job stated by
the author on StackOverflow. I think the code below is clearer.
x = zeros (N, 10);
x(1:N, Y) = 1;
To help narrow it down, it *is* possible to index diagonal arrays either on
the command line or in a function (m-file). A little use of grep shows that
the message "can't perform indexing operations" is only in
libinterp/octave-value/ov-base.cc for either subsref or do_index_op.
I set some breakpoints and tried the code and I got the following backtrace.
#0 octave_base_value::do_multi_index_op (this=0x7fffd41bf7d0)
at libinterp/octave-value/ov-base.cc:200
#1 0x00007ffff6bb6fa7 in octave_base_value::do_multi_index_op (
this=0x7fffd41bf7d0, nargout=0, idx=...)
at libinterp/octave-value/ov-base.cc:209
#2 0x00007ffff6cd734b in octave_value::do_multi_index_op (
this=0x7fffd41af9d8, nargout=0, idx=..., lvalue_list=0x0)
at libinterp/octave-value/ov.cc:1286
#3 0x00007ffff6c5ed2c in octave_fcn_binder::do_multi_index_op (
this=0x7fffd41af850, nargout=0, args=..., lvalue_list=0x0)
at libinterp/octave-value/ov-fcn-handle.cc:2094
#4 0x00007ffff6c5eb9b in octave_fcn_binder::do_multi_index_op (
this=0x7fffd41af850, nargout=0, args=...)
at libinterp/octave-value/ov-fcn-handle.cc:2072
#5 0x00007ffff6cd72d9 in octave_value::do_multi_index_op (
this=0x7fffd8a80400, nargout=0, idx=...)
at libinterp/octave-value/ov.cc:1279
#6 0x00007ffff6df5d23 in get_output_list (count=0, nargout=0, inputlist=...,
func=..., error_handler=...) at libinterp/corefcn/cellfun.cc:79
#7 0x00007ffff6df95ee in Farrayfun (args=..., nargout=0)
at libinterp/corefcn/cellfun.cc:1345
#8 0x00007ffff6bcfc12 in octave_builtin::do_multi_index_op (
this=0x7fffd404b7e0, nargout=0, args=..., lvalue_list=0x0)
at libinterp/octave-value/ov-builtin.cc:125
#9 0x00007ffff6bcf8e3 in octave_builtin::subsref (this=0x7fffd404b7e0,
type=..., idx=..., nargout=0, lvalue_list=0x0)
at libinterp/octave-value/ov-builtin.cc:63
#10 0x00007ffff6bcf7a7 in octave_builtin::subsref (this=0x7fffd404b7e0,
type=..., idx=..., nargout=0) at libinterp/octave-value/ov-builtin.cc:46
#11 0x00007ffff6cd6b4c in octave_value::subsref (this=0x7fffd8a80c10,
type=..., idx=..., nargout=0) at libinterp/octave-value/ov.cc:1197
#12 0x00007ffff6cd6c0e in octave_value::subsref (this=0x7fffd8a80c10,
type=..., idx=..., nargout=0, lvalue_list=0x0)
at libinterp/octave-value/ov.cc:1208
#13 0x00007ffff6d8b25d in tree_index_expression::rvalue (this=0x7fffd466afc0,
nargout=0, lvalue_list=0x0) at libinterp/parse-tree/pt-idx.cc:428
#14 0x00007ffff6d8a6be in tree_index_expression::rvalue (this=0x7fffd466afc0,
nargout=0) at libinterp/parse-tree/pt-idx.cc:269
#15 0x00007ffff6d8b6ae in tree_index_expression::rvalue1 (this=0x7fffd466afc0,
nargout=0) at libinterp/parse-tree/pt-idx.cc:461
#16 0x00007ffff6d838cc in tree_evaluator::visit_statement (
this=0x7ffff7833d60 <std_evaluator>, stmt=...)
at libinterp/parse-tree/pt-eval.cc:708
#17 0x00007ffff6da5420 in tree_statement::accept (this=0x7fffd466b0f0,
tw=...)
at libinterp/parse-tree/pt-stmt.cc:187
#18 0x00007ffff6d83a71 in tree_evaluator::visit_statement_list (
this=0x7ffff7833d60 <std_evaluator>, lst=...)
at libinterp/parse-tree/pt-eval.cc:750
#19 0x00007ffff6da5e6e in tree_statement_list::accept (this=0x7fffd459e2a0,
tw=...) at libinterp/parse-tree/pt-stmt.cc:327
#20 0x00007ffff6cc81d3 in octave_user_script::do_multi_index_op (
this=0x7fffd466b180, nargout=0, args=...)
at libinterp/octave-value/ov-usr-fcn.cc:149
#21 0x00007ffff6cd72d9 in octave_value::do_multi_index_op (
this=0x7fffd8a812b0, nargout=0, idx=...)
at libinterp/octave-value/ov.cc:1279
#22 0x00007ffff6d887b3 in tree_identifier::rvalue (this=0x7fffd45ebb90,
nargout=0, lvalue_list=0x0) at libinterp/parse-tree/pt-id.cc:90
#23 0x00007ffff6d68f92 in tree_identifier::rvalue (this=0x7fffd45ebb90,
nargout=0) at libinterp/parse-tree/pt-id.h:111
#24 0x00007ffff6d889f0 in tree_identifier::rvalue1 (this=0x7fffd45ebb90,
nargout=0) at libinterp/parse-tree/pt-id.cc:116
#25 0x00007ffff6d838cc in tree_evaluator::visit_statement (
this=0x7ffff7833d60 <std_evaluator>, stmt=...)
at libinterp/parse-tree/pt-eval.cc:708
#26 0x00007ffff6da5420 in tree_statement::accept (this=0x7fffd45ebbd0,
tw=...)
at libinterp/parse-tree/pt-stmt.cc:187
#27 0x00007ffff6d83a71 in tree_evaluator::visit_statement_list (
this=0x7ffff7833d60 <std_evaluator>, lst=...)
at libinterp/parse-tree/pt-eval.cc:750
#28 0x00007ffff6da5e6e in tree_statement_list::accept (this=0x7fffd44a6090,
tw=...) at libinterp/parse-tree/pt-stmt.cc:327
#29 0x00007ffff71e2e4f in main_loop () at libinterp/corefcn/toplev.cc:707
#30 0x00007ffff67ff5af in octave_execute_interpreter ()
at libinterp/octave.cc:995
#31 0x00007ffff7a2620a in octave_interpreter::execute (this=0x73cd30)
at libgui/src/octave-interpreter.cc:48
#32 0x00007ffff7a81573 in octave_interpreter::qt_static_metacall (_o=0x73cd30,
_c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x734ab0)
at libgui/src/moc-octave-interpreter.cc:57
#33 0x00007ffff2c1ed01 in QObject::event(QEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#34 0x00007ffff3130cdc in QApplicationPrivate::notify_helper(QObject*,
QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#35 0x00007ffff3137c16 in QApplication::notify(QObject*, QEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#36 0x00007ffff2c0485d in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#37 0x00007ffff2c08316 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#38 0x00007ffff2c3507e in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#39 0x00007fffec48bff7 in g_main_context_dispatch ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007fffec48c250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007fffec48c2fc in g_main_context_iteration ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007ffff2c3520e in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#43 0x00007ffff2c030d1 in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#44 0x00007ffff2c03445 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#45 0x00007ffff2af24f9 in QThread::exec() ()
from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#46 0x00007ffff2af4d1c in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#47 0x00007ffff46846aa in start_thread (arg=0x7fffd8a82700)
at pthread_create.c:333
#48 0x00007ffff43b9e9d in clone ()
at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
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