diff -r e46fa477007b -r 66c9591b733d parse.py
--- a/parse.py	Fri May 24 15:32:10 2019 +0300
+++ b/parse.py	Fri May 24 17:37:10 2019 +0200
@@ -7,27 +7,36 @@
     pass
 
 def parse_ldraw_code(line):
-    if isinstance(line, bytes):
-        line = line.decode()
-    line = line.strip()
-    if not line:
-        return linetypes.EmptyLine()
-    elif line == '0':
-        return linetypes.Comment('')
-    elif line.startswith('0 '):
-        return linetypes.Comment(line[2:])
-    elif line.startswith('1 '):
-        return parse_ldraw_subfile_reference(line)
-    elif line.startswith('2 '):
-        return parse_ldraw_line(line)
-    elif line.startswith('3 '):
-        return parse_ldraw_triangle(line)
-    elif line.startswith('4 '):
-        return parse_ldraw_quadrilateral(line)
-    elif line.startswith('5 '):
-        return parse_ldraw_conditional_line(line)
+    try:
+        if isinstance(line, bytes):
+            line = line.decode()
+        line = line.strip()
+        if not line:
+            return linetypes.EmptyLine()
+        elif line == '0':
+            return linetypes.MetaCommand('')
+        elif line.startswith('0 '):
+            return parse_ldraw_meta_line(line)
+        elif line.startswith('1 '):
+            return parse_ldraw_subfile_reference(line)
+        elif line.startswith('2 '):
+            return parse_ldraw_line(line)
+        elif line.startswith('3 '):
+            return parse_ldraw_triangle(line)
+        elif line.startswith('4 '):
+            return parse_ldraw_quadrilateral(line)
+        elif line.startswith('5 '):
+            return parse_ldraw_conditional_line(line)
+        else:
+            raise BadLdrawLine('unknown line type')
+    except BadLdrawLine as error:
+        return linetypes.Error(line, str(error))
+
+def parse_ldraw_meta_line(line):
+    if line.startswith('0 //'):
+        return linetypes.Comment(line[4:])
     else:
-        raise BadLdrawLine('unknown line type')
+        return linetypes.MetaCommand(line[2:])
 
 def parse_ldraw_subfile_reference(line):
     pattern = r'^1\s+([^ ]+)' + r'\s+([^ ]+)' * (3 + 9 + 1) + r'\s*$'
@@ -74,8 +83,12 @@
         except ValueError:
             raise BadLdrawLine('bad numeric values')
         vertices.append(Vertex(*coordinates))
+    try:
+        colour = int(match.group(1), 0)
+    except ValueError:
+        raise BadLdrawLine('invalid syntax for colour: ' + repr(match.group(1)))
     return {
-        'colour': Colour(match.group(1)),
+        'colour': Colour(colour),
         'vertices': vertices,
     }