[Bug c++/9541] Bogus "warning: can't find linker symbol for virtual table for 'Foo' value" messages

[Bug c++/9541] Bogus "warning: can't find linker symbol for virtual table for 'Foo' value" messages

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=9541

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING
                 CC|                            |tromey at redhat dot com

--- Comment #1 from Tom Tromey <tromey at redhat dot com> 2012-11-28 17:43:21 UTC ---
This has been reported before but never with a test case.
I don't know how to reproduce it.
Does it still fail with a newer gdb?
If so can you make a small test case?

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[Bug c++/9541] Bogus "warning: can't find linker symbol for virtual table for 'Foo' value" messages

[vz-gdb at zeitlins dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=9541

--- Comment #2 from vz-gdb at zeitlins dot org 2012-11-28 19:26:13 UTC ---
(In reply to comment #1)
> This has been reported before but never with a test case.
> I don't know how to reproduce it.

Unfortunately me neither. I've never seen it in small test applications.

> Does it still fail with a newer gdb?
> If so can you make a small test case?

I've seen it just recently with 7.2.50.20100904-cvs (still Debian, x86-64,
using wxWidgets shared libraries) and I can retest it with a later version if
it can help, but I unfortunately have no idea how to reproduce this in a simple
test case. Please let me know if you'd like me to test with the latest gdb
nevertheless.

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[Bug c++/9541] Bogus "warning: can't find linker symbol for virtual table for 'Foo' value" messages

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=9541

--- Comment #3 from Tom Tromey <tromey at redhat dot com> 2012-11-28 20:22:44 UTC ---
(In reply to comment #2)
> Please let me know if you'd like me to test with the latest gdb
> nevertheless.

It's worth a try.

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[Bug c++/9541] Bogus "warning: can't find linker symbol for virtual table for 'Foo' value" messages

[vz-gdb at zeitlins dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=9541

--- Comment #4 from vz-gdb at zeitlins dot org 2012-11-29 20:03:04 UTC ---
I can confirm that the problem still exists with 7.5.50.20121129-cvs version
(built from sources without any special configure options under bog standard
x64 Debian system). I didn't see it with wxWindow yet but just showing the
value of some random window pointer I see the following:

(gdb) p *this
$4 = (wxNumberEntryDialog) {
  <wxDialog> = {
    <wxDialogBase> = {
      <wxTopLevelWindow> = {
        <wxTopLevelWindowGTK> = {
          <wxTopLevelWindowBase> = {
            <wxNavigationEnabled<wxNonOwnedWindow>> = {
              <wxNonOwnedWindow> = {
                <wxNonOwnedWindowBase> = {
                  <wxWindow> = {
                    <wxWindowBase> = {
...
                      m_font = warning: can't find linker symbol for virtual
table for `wxFont' value
{
                        <wxFontBase> = {
                          <wxGDIObject> = {
                            <wxObject> = {
                              _vptr.wxObject = 0x67e510
<_ZTV6wxFont@@WXU_2.9+16>,
                              m_refData = 0x0
                            },
                          },
                        },
                      },
                      m_backgroundColour = warning: can't find linker symbol
for virtual table for `wxColour' value
{
                        <wxColourBase> = {
                          <wxGDIObject> = {
                            <wxObject> = {
                              _vptr.wxObject = 0x67b330
<_ZTV8wxColour@@WXU_2.9+16>,
                              m_refData = 0x0
                            },
                          }, <No data fields>},
                      },
...
(gdb) p this->m_font
$5 = warning: can't find linker symbol for virtual table for `wxFont' value
warning: can't find linker symbol for virtual table for `wxFont' value
{
  <wxFontBase> = {
    <wxGDIObject> = {
      <wxObject> = {
        _vptr.wxObject = 0x67e510 <_ZTV6wxFont@@WXU_2.9+16>,
        m_refData = 0x0
      },
    },
  },
}

AFAICS there is absolutely nothing special about wxFont and wxColour classes
compared to many others that it doesn't seem to have problems with.

Please let me know if there is anything else I can do to help finding this bug.

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[Bug c++/9541] Bogus "warning: can't find linker symbol for virtual table for 'Foo' value" messages

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=9541

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |DUPLICATE

--- Comment #5 from Tom Tromey <tromey at redhat dot com> 2013-03-06 20:05:28 UTC ---
Most likely a dup.

*** This bug has been marked as a duplicate of bug 11990 ***

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