Re: error when plotting with graphics_toolkit fltk : "... octave-cli-3.8.2[30626] <Error>: CGContextFillRects: invalid context 0x0...."

[Ben Abbott]

> On May 13, 2015, at 1:23 PM, sts <address@hidden> wrote:
> 
> I have just installed octave 3.8.2 on osx 10.9.5 via macport.
> 
> When I try to plot with graphics_toolkit fltk I see the messages:
> 
> octave:1> graphics_toolkit('fltk')
> octave:2> plot(1)
> May 13 18:16:39 sts-MacBook-Pro.local octave-cli-3.8.2[30626] <Error>: 
> CGContextFillRects: invalid context 0x0. This is a serious error. This 
> application, or a library it uses, is using an invalid context  and is 
> thereby contributing to an overall degradation of system stability and 
> reliability. This notice is a courtesy: please fix this problem. It will 
> become a fatal error in an upcoming update.
> May 13 18:16:39 sts-MacBook-Pro.local octave-cli-3.8.2[30626] <Error>: 
> CGContextMoveToPoint: invalid context 0x0. This is a serious error. This 
> application, or a library it uses, is using an invalid context  and is 
> thereby contributing to an overall degradation of system stability and 
> reliability. This notice is a courtesy: please fix this problem. It will 
> become a fatal error in an upcoming update.
> May 13 18:16:39 sts-MacBook-Pro.local octave-cli-3.8.2[30626] <Error>: 
> CGContextAddLineToPoint: invalid context 0x0. This is a serious error. This 
> application, or a library it uses, is using an invalid context  and is 
> thereby contributing to an overall degradation of system stability and 
> reliability. This notice is a courtesy: please fix this problem. It will 
> become a fatal error in an upcoming update.
> ...
> ...
> ...
> May 13 18:16:40 sts-MacBook-Pro.local octave-cli-3.8.2[30626] <Error>: 
> CGContextAddLineToPoint: invalid context 0x0. This is a serious error. This 
> application, or a library it uses, is using an invalid context  and is 
> thereby contributing to an overall degradation of system stability and 
> reliability. This notice is a courtesy: please fix this problem. It will 
> become a fatal error in an upcoming update.
> May 13 18:16:40 sts-MacBook-Pro.local octave-cli-3.8.2[30626] <Error>: 
> CGContextDrawPath: invalid context 0x0. This is a serious error. This 
> application, or a library it uses, is using an invalid context  and is 
> thereby contributing to an overall degradation of system stability and 
> reliability. This notice is a courtesy: please fix this problem. It will 
> become a fatal error in an upcoming update.
> May 13 18:16:40 sts-MacBook-Pro.local octave-cli-3.8.2[30626] <Error>: 
> CGContextFillRects: invalid context 0x0. This is a serious error. This 
> application, or a library it uses, is using an invalid context  and is 
> thereby contributing to an overall degradation of system stability and 
> reliability. This notice is a courtesy: please fix this problem. It will 
> become a fatal error in an upcoming update.
> Fontconfig warning: ignoring UTF-8: not a valid region tag
> octave:3>
> 
> here I have reported only the first three and the last three messages, but 
> there are a few hundreds of other similar messages in between. After that the 
> plot looks ok. When I use gnuplot, instead I get
> 
> octave:1> graphics_toolkit('gnuplot')
> octave:2> plot(1)
> Fontconfig warning: ignoring UTF-8: not a valid region tag
> octave:3>
> 
> And the plot looks fine also in this case.
> I have no idea what is the meaning of these messages. Can anyone help me to 
> understand where the problem could be?
> 
> Thanks
> sts

There’s a bug report on this problem.

http://savannah.gnu.org/bugs/?43968

Ben