When line_width is set to 0 the glyph boundaries don't disappear

For defects or deficiencies, please provide ALL OF THE FOLLOWING:

ALL software version info (bokeh, python, notebook, OS, browser, any other relevant packages)

bokeh 1.0.4, python 3.6.6, notebook Kaggle, OS Windows 10, browser Chrome

Description of expected behavior and the observed behavior

I am trying to remove the glyph boundaries by using line_width=0 but they don’t disappear. As a temporary fix I use line_alpha=0 instead.

Complete, minimal, self-contained example code that reproduces the issue

from bokeh.plotting import figure, output_file, show

output_file("patch.html")

p = figure(plot_width=400, plot_height=400)

p.patch([1, 2, 3, 4, 5], [6, 7, 8, 7, 3], fill_color='white', line_width=0)

show(p)

Screenshots or screencasts of the bug in action

[bryevdv]

One possible reason to do something: Currently line_color=None actively suppresses the call to ctx.stroke whereas line_alpha=0 still calls ctx.stroke but the result just happens to be invisible. If this were generalized then we could consistently prevent code execution for invisible configurations in all cases.

[jbednar]

I agree; a bad or very difficult fix isn’t worth it. But if there is a good, easy fix, I’d say it’s worth it; people will often not report something like this if there’s a workaround. Sounds like there isn’t, but if generalizing that approach is useful for some other reason, addressing this problem could be considered.