@@ -874,6 +874,7 @@ where compile() was called, in untrusted/run.js.
 					vars = vars.slice(0,-2)+'}\n'
 					purge = purge.slice(0,-2)
 				}
+				prog += "  print = GSprint\n"
 				prog += "  arange = range\n"
 				prog += "  __name__ = '__main__'\n" // handles common Python test: if __name__ == '__main__':
 				prog += "  type = pytype\n" // override RapydScript type() function
@@ -922,7 +923,7 @@ where compile() was called, in untrusted/run.js.
 		// Python and VPython and RapydScript and JavaScript key words that can precede '(':
 		let no_await = ['if', 'elif', 'return', 'for', 'while', 'function', 'else', 'dict', 'str',
 		'float', 'hex', 'int', 'iter', 'len', 'list', 'vec', 'vector', 'catch', 'enumerate',
-		'oct', 'ord', 'print', 'range', 'arange', 'update', 'print', 'clock', 'msclock',
+		'oct', 'ord', 'print', 'range', 'arange', 'update', 'print', 'GSprint', 'clock', 'msclock',
 		'canvas', 'graph', 'gcurve', 'gdots', 'gvbars', 'ghbars', 'rotate', 'box', 'cylinder',
 		'cone', 'pyramid', 'sphere', 'simple_sphere', 'arrow', 'curve', 'points', 'paths',
 		'shapes', 'helix', 'ring', 'compound', 'vertex', 'triangle', 'quad', 'label', 
 
@@ -800,6 +800,7 @@
         print: print,
         __convert: convert,
         __parsearray: parsearray,
+        GSprint: print, // avoid a conflict with RapydScript print function by inserting _$rapyd$_print = GSprint
         print_to_string: print_to_string,
         print_options: print_options,
         clock: clock,
 
@@ -597,6 +597,9 @@ function extrusion(args) {
                 throw new Error('The length '+slen+' of the list of scale values does not match the length '+args.path.length+' of the path.')
             if (path_closed && (args.scale[slen-1] !== args.scale[0]))
                 throw new Error('With a closed path, the last scale value, '+args.scale[slen-1]+', must equal the first scale value, '+args.scale[0]+'.')
+            for (i=0; i<args.scale.length; i++) {
+                if (args.scale[i] == 0) args.scale[i] = 0.0000001 // prevent error posting
+            }
         }
     } else args.scale = null
     if (args.xscale !== undefined) {
 
@@ -1295,13 +1295,12 @@ path_object.prototype.line = function line(args) {
     if (args.yscale === undefined) args.yscale = 1
     if (args.start === undefined) args.start = vec(0,0,0)
     if (args.end === undefined) args.end = vec(0,0,-0.1)
-    var v, vline, i
-    var cp = [args.start]
+    let v, dv, i
+    let cp = [args.start]
     v = args.end.sub(args.start)
-    vline = v.divide(Math.floor(args.np-1))
+    dv = v.divide(Math.floor(args.np-1))
     for (i = 1; i < args.np; i++) {
-    	cp.push(args.start.add(vline))
-    	vline = vline.add(vline)
+    	cp.push(cp[i-1].add(dv))
     }
     return cp
 }