#84 ghostscript cannot process some idraw files

[Agustin Martin Domingo]

Hi, Scott

As you suggested, I am opening a real bug report for this so others are aware.
Unfortunately I could not yet find what is exactly causing this, since is not
happening everytime, but just some times.

Original thread at

https://sourceforge.net/mailarchive/forum.php?thread_name=3CAC1D4B-1B93-41E8-85E0-9E4278B4BFF9%40vectaport.com&forum_name=ivtools-devel

My original message:

I noticed that sometimes files created by idraw 1.2.6 cannot be processed
by ghostscript, which fails with an error (lines are formatted)

------------------------------------ 8< ---------------------------------
Execution stack:
%interp_exit .runexec2 --nostringval-- --nostringval--
% --nostringval-- 2 %stopped_push --nostringval-- --nostringval--
% -- --nostringval-- false 1 %stopped_push 1862 1 3
% -- -- %oparray_pop 1861 1 3 %oparray_pop --nostringval--
% -- -- % 1845 1 3 %oparray_pop 1739 1 3 %oparray_pop
% -- -- % --nostringval-- %errorexec_pop .runexec2 --nostringval--
% -- -- % -- --nostringval-- --nostringval-- 2 %stopped_push
% -- -- % -- -- --nostringval-- --nostringval--
Dictionary stack:
--dict:1154/1684(ro)(G)-- --dict:0/20(G)-- --dict:81/200(L)--
-- --dict:33/50(L)-- --dict:1/17(L)-- --dict:14/17(L)--
Current allocation mode is local
Current file position is 8551
GPL Ghostscript 8.70: Unrecoverable error, exit code 1
------------------------------------ 8< ---------------------------------

I could not yet isolate what is exactly triggering the problem during
edition, but noticed that in a buggy file, when I remove visible elements
in a one by one basis (individual select+delete), I end up with a
supposedly empty file that is still buggy.

If I then do a 'select all', nothing is shown as selected, but if issue the
delete command from the menu or the 'x' key file is marked as changed, and
as a matter of fact saved file does no longer trigger a ghostscript failure.

Scott Johnston reply,

In the idraw file with a problem you have a multi-line and a polygon
grouped together, both of zero length. I found them by importing the
file into comdraw and using its scripting commands to select and
inspect them. Not sure how these got created.