[Octave-bug-tracker] [bug #57792] patch command returns error

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?57792>

                 Summary: patch command returns error
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Tue 11 Feb 2020 07:22:26 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: Glenn Groeschel
        Originator Email: address@hidden
             Open/Closed: Open
                 Release: 5.2.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

When calling the patch command, in release 5.2.0 (hg id: eb46a9f47164) an
error is returned when NaN's exist in the vertices.  Release 5.1.0 (hg id:
d05d6eebde10) completes successfully, and also matches Matlab output.

Running on Windows 7 Professional 64bit.  

The following code produces the error in 5.2.0 for the second figure.  First
figure (without NaN's is rendered properly for 5.1.0 and 5.2.0)

figure;
hax=gca;
v2 = [2 4 1; 2 8 0; 7 8 5; 8 4 2; 5 0 3; 5 2 4; 8 2 4; 8 0 5];
f2 = [1 2 3 4; 
     5 6 7 8];
c=[0;.2;.5;.7;.8;1;0.4;.3];    
%This works fine
patch(hax,'Faces',f2,'Vertices',v2,'FaceVertexCData',c,'FaceColor','interp','EdgeColor','interp','FaceAlpha',1,'DisplayName','test1');

figure;
hax2=gca;
v2(2:3,:)=NaN;
%This returns error
patch(hax2,'Faces',f2,'Vertices',v2,'FaceVertexCData',c,'FaceColor','interp','EdgeColor','interp','FaceAlpha',1,'DisplayName','test2');



The error produced on my machine is:

DLASCL: parameter number 4 is invalid
error: Fortran procedure terminated by call to XERBLA
error: __go_patch__: unable to create graphics handle
error: called from
    __patch__ at line 171 column 7
    patch at line 86 column 18
    patch_test_simp at line 16 column 1


Noticed some other recent submissions related to patch, but this seemed like
it may be a different issue.






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