Possible error in CDxfRead::DoRead: missing POLYLINE

[stefan006]

There're two consecutive "0" lines in the DXF file. DoRead reads the first "0" and jumps into if(!strcmp(m_str, "0")), then reads the next line which is a "0" again. It jumps out of if(!strcmp(m_str, "0")) and reads the next line which is "POLYLINE". It doesn't do anything with POLYLINE because it is outside of if(!strcmp(m_str, "0"))

This is part of my example file. I'm not allowed to post the whole file. This file has two POLYLINE. SEQEND is the end of the previous POLYLINE.

0
SEQEND
5
1328E9
8
0
0
POLYLINE

[stefan006]

This is how I fixed it. It works for the few files I have. I don't know whether it breaks anything because I don't know the DXF format very well.

diff --git a/Application/core/dxf/dxf.cpp b/Application/core/dxf/dxf.cpp
index 18a85d9084..0998cafd86 100644
--- a/Application/core/dxf/dxf.cpp
+++ b/Application/core/dxf/dxf.cpp
@@ -2612,10 +2612,13 @@ void CDxfRead::DoRead(const bool ignore_errors /* = false */ )
 	{
 		if(!strcmp(m_str, "0"))
 		{
 			m_thickness = 0.0;
 			get_line();
+                        while (!strcmp(m_str, "0"))
+                            get_line();
+
 			if (!strcmp( m_str, "SECTION" )){
 				if(!ReadSection())
 				{
 					wprintf(wxT("CDxfRead::DoRead() Failed to read block\n"));
 					return;