Re: GNUstep app fails on Ubuntu 16

[Andreas Höschler]

Hi all,

I have retried my application under art. When I open one of the problematic forms I now get 

2020-05-06 18:43:11.295 SOObjectBrowser[8177:8177] File NSView.m: 1183. In -[NSView setFrame:] given negative width

2020-05-06 18:43:11.295 SOObjectBrowser[8177:8177] File NSView.m: 1188. In -[NSView setFrame:] given negative height

2020-05-06 18:43:11.384 SOObjectBrowser[8177:8177] Warning: shmget() failed: Invalid argument.

2020-05-06 18:43:11.384 SOObjectBrowser[8177:8177] Falling back to normal XImage (will be slower).

2020-05-06 18:43:11.384 SOObjectBrowser[8177:8177] Warning: failed to create image for window!

2020-05-06 18:43:11.387 SOObjectBrowser[8177:8177] Warning: shmget() failed: Invalid argument.

2020-05-06 18:43:11.387 SOObjectBrowser[8177:8177] Falling back to normal XImage (will be slower).

2020-05-06 18:43:11.387 SOObjectBrowser[8177:8177] Warning: failed to create image for window!

2020-05-06 18:43:12.696 SOObjectBrowser[8177:8177] X-Windows error - BadAlloc (insufficient resources for operation)

          on display: :0

                type: 0

       serial number: 21442

        request code: 130

2020-05-06 18:43:12.697 SOObjectBrowser[8177:8177] X-Windows error - BadPixmap (invalid Pixmap parameter)

          on display: :0

                type: 0

       serial number: 21443

        request code: 2

and the app fails (hangs). Hmmgh!! Could the problem be related to this

2020-05-06 18:43:11.295 SOObjectBrowser[8177:8177] File NSView.m: 1183. In -[NSView setFrame:] given negative width

2020-05-06 18:43:11.295 SOObjectBrowser[8177:8177] File NSView.m: 1188. In -[NSView setFrame:] given negative height

message? My code works on MacOSX and used to work on older GNUstep releases. This of course does not mean much. There could still be a problem that is tolerated by the other two environments. I will try to figure out where this "given negative ..." stuff comes from. However, if this already rings any bells I would be glad to hear your suggestions. 

I inserted

[NSException raise:...]

in NSView where it complains about the given negative widths and got

#1  0x00007fabaac53bba in +[NSException raise:format:arguments:] (self=0x7fabab1b4020 <_OBJC_Class_NSException>, _cmd=0x7fabab1b44b0 <_OBJC_SELECTOR_TABLE+432>, name=0x7fabab1b39e0 <_OBJC_INSTANCE_4>, format=0x7fabac4470c0 <_OBJC_INSTANCE_17>, argList=0x7ffd30cc6450)

    at NSException.m:1465

#2  0x00007fabaac53b01 in +[NSException raise:format:] (self=0x7fabab1b4020 <_OBJC_Class_NSException>, _cmd=0x7fabac449790 <_OBJC_SELECTOR_TABLE+1712>, name=0x7fabab1b39e0 <_OBJC_INSTANCE_4>, format=0x7fabac4470c0 <_OBJC_INSTANCE_17>) at NSException.m:1450

#3  0x00007fababf8f9d5 in -[NSView setFrame:] (self=0x2c47500, _cmd=0x7fabac40e9f0 <_OBJC_SELECTOR_TABLE+624>, frameRect=...) at NSView.m:1184

#4  0x00007fababf2b740 in -[NSTabView selectTabViewItem:] (self=0x1a194e0, _cmd=0x7fabac40e880 <_OBJC_SELECTOR_TABLE+256>, tabViewItem=0x2e1ea40) at NSTabView.m:274

#5  0x00007fababf2adb8 in -[NSTabView insertTabViewItem:atIndex:] (self=0x1a194e0, _cmd=0x7fabac40e850 <_OBJC_SELECTOR_TABLE+208>, tabViewItem=0x2e1ea40, index=0) at NSTabView.m:120

#6  0x00007fababf2acd2 in -[NSTabView addTabViewItem:] (self=0x1a194e0, _cmd=0x7faba8050510 <_OBJC_SELECTOR_TABLE+2288>, tabViewItem=0x2e1ea40) at NSTabView.m:106

...

The related code is

         NSTabViewItem *tabViewItem = [[NSTabViewItem alloc] initWithIdentifier:identifier];

         [someTabView addTabViewItem:tabViewItem];

         [tabViewItem release];

Hmmgh! It seems that NSTabView calculates some unhealthy frame here. Can anybody with insights see whether this is related to the rest of the error chain?

Thanks,

 Andreas