line_create's "trace" parameter seems to misbehave under some
circumstances when you alter the axis mins and maxes. Here is some code that reproduces the problem: http://codepad.org/DcPZq7lX
If you comment out the call to xaxis_configure, it draws three horizontal lines, which is correct behavior. But with the call, it draws a different, strange set of lines.
Is this a bug? If so, is there a workaround any of you can suggest?