User defined signals - something changed!

[Diana Esch-Mosher <desch-mosher lanl gov>]

I upgraded to the latest gtk+ (2.4.14 from the gladewin installer) and 
the latest gtkmm (2.4.8).  My application on XP now dies in startup. In 
creating my toplevel window I first create an object that creates a 
user-defined signal  (view_changed) . A ton of other things I create 
during the constructor of toplevel want to connect to this view_changed 
signal. I die as soon as my program hits a connect for this signal. Can 
someone give me a clue as to what has changed such that this is no 
longer valid (my program has NOT changed).  I was using 2.4.10 with 2.4.5.

PS. I would love to check this on linux, but my hard drive went belly up 
yesterday!

Diana Esch-Mosher

Here is the pertinent Dr. Mingw output:

zing.exe caused an Access Violation at location 026034a7 in module 
libsigc-2.0-0.dll Writing to location 00000000.

Registers:
eax=00000000 ebx=0022f6f0 ecx=03cc7148 edx=03c72914 esi=03c7290c 
edi=00000045
eip=026034a7 esp=0022f4b8 ebp=0022f4b8 iopl=0         nv up ei pl zr na 
po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000             
efl=00000246

Call stack:
AddrPC     AddrReturn AddrFrame  AddrStack  Params
026034A7   02639924   0022F4B8   0022F4B8   03CC7148   03C72914   
0022F4E8   02601608
026034A7  libsigc-2.0-0.dll:026034A7c:\GTKMM\bin\libsigc-2.0-0.dll: No 
symbol found
 _ZN4sigc9slot_base7unblockEv
02639924   02601548   0022F518   0022F4B8   03C72914   03C72914   
0022F6D0   026018C7
02639924  libsigc-2.0-0.dll:02639924c:\GTKMM\bin\libsigc-2.0-0.dll: No 
symbol found
 _ZNSt4listIN4sigc9slot_baseESaIS1_EE6insertESt14_List_iteratorIS1_ERKS1_
02601548   0260158F   0022F538   0022F4B8   03C7290C   03C72914   
0022F6D0   004EFE24
02601548  libsigc-2.0-0.dll:02601548c:\GTKMM\bin\libsigc-2.0-0.dll: No 
symbol found
 
_ZN4sigc8internal11signal_impl6insertESt14_List_iteratorINS_9slot_baseEERKS3_
0260158F   02601770   0022F558   0022F4B8   03C7290C   0022F6D0   
0022F5A8   004EFDF7
0260158F  libsigc-2.0-0.dll:0260158Fc:\GTKMM\bin\libsigc-2.0-0.dll: No 
symbol found
 _ZN4sigc8internal11signal_impl7connectERKNS_9slot_baseE
02601770   004EFDF7   0022F568   0022F4B8   0022F590   0022F6D0   
0022F700   7FFDF000
02601770  libsigc-2.0-0.dll:02601770c:\GTKMM\bin\libsigc-2.0-0.dll: No 
symbol found
 _ZN4sigc11signal_base7connectERKNS_9slot_baseE
004EFDF7   0042C1EF   0022F5A8   0022F4B8   0022F6F0   0022F6D0   
0022F700   00000000
004EFDF7  
zing.exe:004EFDF7C:\msys\1.0\home\115248\src\zing\src\zing.exe: No 
symbol found

0042C1EF   0049BAAF   0022F728   0022F4B8   03CB4900   03C4C880   
004870ED   00000000
0042C1EF  zing.exe:0042C1EF  
Zing::LayerDialog::LayerDialog(Zing::TopLevel*)  LayerDialog.cc:79
   ...
       show_all_children();
  
>        topLevel->get_layer_set()->
         view_changed().connect(sigc::mem_fun(*this, 
&LayerDialog::onViewChanged));                                                                                

       topLevel->get_layer_set()->file_renamed().connect( 
sigc::mem_fun(*this, &LayerDialog::onFileRenamed) );
   ...

0049BAAF   00406F01   0022FE48   0022F4B8   03C4C880   000000E1   
00000136   000000E1
0049BAAF  zing.exe:0049BAAF  Zing::TopLevel::TopLevel(int, int, int, 
int, int, int)  TopLevel.cc:298
   ...
  
       solutionDialog = 0;
>        layerDialog = new LayerDialog(this);
       imageControls = new ImageControls(this);
       vectorizerDialog = new VectorizerDialog(this);
   ...

00406F01   004388B1   0022FEC8   0022F4B8   03C584D0   00000045   
0022FF90   004388A3
00406F01  zing.exe:00406F01  Zing::App::create_top_level()  App.cc:113
   ...
     {
       //Instantiate the GUI
>        topLevel = new TopLevel(TOOLBOX_DEF_WIDTH, TOOLBOX_DEF_HEIGHT,
       NAVIGATOR_DEF_WIDTH, NAVIGATOR_DEF_HEIGHT,
       VIEWER_DEF_WIDTH, VIEWER_DEF_HEIGHT);
   ...

004388B1   0040122D   0022FF90   0022F4B8   00000001   03C412E8   
036D2FE0   E2714C00
004388B1  zing.exe:004388B1  main  main.cc:55
   ...
     // instantiate Window - needs to be done after preferences!
     //msg << "about to create_top_level()\n";
>      TopLevel *topLevel=zing->create_top_level();
     //msg << "done with create_top_level()\n";
  
   ...