[Plplot-devel] [bug] plmap with a polygon map causes a call to plabort

[Mark de W. <m.d...@da...>]

Hi,

While testing plplot 5.11.1 with a map with polygons on Windows my 
application terminated due to a call to plabort. It was caused by 
calling plfill with n < 3. I investigated further on my Debian Stable 
system with a recent version of master [d71e48]. The bug is still 
present in this version.

Attached a modified x19.cc which calls plabort when drawing the map. In 
order to do so I replaced the cglobe.sh? files with the files in this 
archive [1] (854.21 KB). The first plot is fine, the seconds calls plabort.

I added a proof-of-concept fix, which also cleans up the duplicate tests 
in the if statements in drawmapdata. I'm not convinced this is the right 
approach. I still see glitches, but I'm not sure whether they are all 
caused by fact lines at the left hand side of the plot are sometimes 
omitted.


[1] 
http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/50m/cultural/ne_50m_admin_0_countries_lakes.zip

Regards,
Mark de Wever