RuntimeError('Cannot apply patch to [id] which is not in the document',) when clicking the Reset button

When I add a figure to a layout after the layout is created, then pan it and reset it, I get the following error (or similar) in the console:

2018-04-03 13:39:59,227 error handling message Message 'PATCH-DOC' (revision 1): RuntimeError('Cannot apply patch to E0EFBC2CAC454F319C97899A5E36FB03 which is not in the document',)
2018-04-03 13:39:59,229 error handling message Message 'PATCH-DOC' (revision 1): RuntimeError('Cannot apply patch to E0EFBC2CAC454F319C97899A5E36FB03 which is not in the document',)
2018-04-03 13:39:59,231 error handling message Message 'PATCH-DOC' (revision 1): RuntimeError('Cannot apply patch to E0EFBC2CAC454F319C97899A5E36FB03 which is not in the document',)

This does not occur if the figure is added to the column on creation (see tan(x) example below).

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

Windows 10, Python 3.6.4, Bokeh 0.12.15, NumPy 1.14.0, Chrome 65.0.3325.181 (also occurs on Brave 0.22.13).

Description of expected behavior and the observed behavior

Expected behavior: no errors thrown in either the JS console or the terminal.

Observed behavior: figure resets, but errors are thrown.

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

import numpy as np

from bokeh.layouts import column, layout
from bokeh.models import Button
from bokeh.plotting import figure, curdoc

def plot_sin():
	global left_col
	
	if len(left_col.children) == 1:
		p = figure(plot_width=500, plot_height=300)
		x = np.linspace(0, 1, 100)
		p.circle(x, np.sin(2*np.pi*x), color="red")

		left_col.children.append(p)
	
def plot_cos():
	global right_col
	
	if len(right_col.children) == 1:
		p = figure(plot_width=500, plot_height=300)
		x = np.linspace(0, 1, 100)
		p.circle(x, np.cos(2*np.pi*x), color="red")
		
		right_col.children.append(p)
	
doc = curdoc()

sin_button = Button(label="plot sin(x)", width=100, button_type="danger")
sin_button.on_click(plot_sin)

tan_button = Button(label="plot tan(x)", width=100, button_type="success")

cos_button = Button(label="plot cos(x)", width=100, button_type="danger")
cos_button.on_click(plot_cos)

tan_figure = figure(plot_width=500, plot_height=300)
x = np.linspace(0, 1, 100)
tan_figure.circle(x, np.tan(2*np.pi*x), color="green")

left_col = column([sin_button], name="left", width=500)
mid_col = column([tan_button, tan_figure], name="middle", width=500)
right_col = column([cos_button], name="right", width=500)

page = layout(children=[[left_col, mid_col, right_col]])
doc.add_root(page)

Stack traceback and/or browser JavaScript console output

Here’s the JS console output:

session.js:85 [bokeh] Unhandled ERROR reply to 020852938CA94EAC868374171A265F0B: RuntimeError('Cannot apply patch to E0EFBC2CAC454F319C97899A5E36FB03 which is not in the document',)
t._handle_error @ session.js:85
t.handle @ session.js:27
t._steady_state_handler @ connection.js:275
ACK.t.msgtype._current_handler @ connection.js:256
t._on_message @ connection.js:217
t.socket.onmessage @ connection.js:67
session.js:85 [bokeh] Unhandled ERROR reply to 0DDF05BC974D4EBAB148667F0A4E39B6: RuntimeError('Cannot apply patch to E0EFBC2CAC454F319C97899A5E36FB03 which is not in the document',)
t._handle_error @ session.js:85
t.handle @ session.js:27
t._steady_state_handler @ connection.js:275
ACK.t.msgtype._current_handler @ connection.js:256
t._on_message @ connection.js:217
t.socket.onmessage @ connection.js:67
session.js:85 [bokeh] Unhandled ERROR reply to D9118580329C41078B9D18F5D79E7C56: RuntimeError('Cannot apply patch to E0EFBC2CAC454F319C97899A5E36FB03 which is not in the document',)
t._handle_error @ session.js:85
t.handle @ session.js:27
t._steady_state_handler @ connection.js:275
ACK.t.msgtype._current_handler @ connection.js:256
t._on_message @ connection.js:217
t.socket.onmessage @ connection.js:67

Screenshots or screencasts of the bug in action

I see similar errors referred to, e.g., #4810 and #4764, but they are marked closed. Is this potentially a regression? I hadn’t noticed this before updating to 0.12.15.

[bryevdv]

This seems to have been fixed at some point, using the original code I cannot reproduce any errors on current master either in the shell or the js console:

If an issue persists please add additional information to reproduce and we can re-open.

[asartori86]

I encountered the same behavior. With these lines, I get the error message

f1 = make_fig1()
f2 = make_fig2()

layout.children[1].children[0] = f1
layout.children[1].children[1] = f2

while if I update the layout as follows the warning disappears

layout.children[1].children[0:2] = [f1,f2]