Blank window on OS X with tk 8.6.9 builds after ha441bb4_1000

[JimBiardCics]

Issue: Simple Tk-based application produces a blank window for tk 8.6.9 builds after ha441bb4_1000. The simple application

from tkinter import *

root = Tk()

w = Label(root, text = 'Hello, world.')

w.pack()

root.mainloop()

produced the expected results with tk 8.6.9 build ha441bb4_1000, but with builds ha441bb4_1001 or h2573ce8_1002, the window had no visible contents. The window frame was OK, but the interior was all white.

I found this problem with an application with a more complex UI. Moving the cursor around the window seemed to indicate that the widgets were present (the cursor changed to a text entry caret over the locations of text widgets, for example), but all pixels in the window were white. If I tried to resize the window the entire contents turned black. The window title contained the expected contents.


Environment (conda list):

Details

# packages in environment at /Users/jbiard/miniconda3/envs/TkTest:
#
# Name                    Version                   Build  Channel
bzip2                     1.0.8                h01d97ff_0    conda-forge
ca-certificates           2019.6.16            hecc5488_0    conda-forge
certifi                   2019.6.16                py37_1    conda-forge
libcxx                    8.0.0                         4    conda-forge
libcxxabi                 8.0.0                         4    conda-forge
libffi                    3.2.1             h6de7cb9_1006    conda-forge
ncurses                   6.1               h0a44026_1002    conda-forge
openssl                   1.1.1c               h01d97ff_0    conda-forge
pip                       19.2.1                   py37_0    conda-forge
python                    3.7.3                h93065d6_1    conda-forge
readline                  8.0                  hcfe32e1_0    conda-forge
setuptools                41.0.1                   py37_0    conda-forge
sqlite                    3.29.0               hb7d70f7_0    conda-forge
tk                        8.6.9             h2573ce8_1002    conda-forge
wheel                     0.33.4                   py37_0    conda-forge
xz                        5.2.4             h1de35cc_1001    conda-forge
zlib                      1.2.11            h01d97ff_1005    conda-forge

Details about conda and system ( conda info ):

Details

     active environment : TkTest
    active env location : /Users/jbiard/miniconda3/envs/TkTest
            shell level : 4
       user config file : /Users/jbiard/.condarc
 populated config files : /Users/jbiard/.condarc
          conda version : 4.7.10
    conda-build version : 3.10.9
         python version : 2.7.15.final.0
       virtual packages : 
       base environment : /Users/jbiard/miniconda3  (writable)
           channel URLs : https://conda.anaconda.org/conda-forge/osx-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://conda.anaconda.org/jevans/osx-64
                          https://conda.anaconda.org/jevans/noarch
                          https://conda.anaconda.org/pelson/osx-64
                          https://conda.anaconda.org/pelson/noarch
                          https://repo.anaconda.com/pkgs/main/osx-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/osx-64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /Users/jbiard/miniconda3/pkgs
                          /Users/jbiard/.conda/pkgs
       envs directories : /Users/jbiard/miniconda3/envs
                          /Users/jbiard/.conda/envs
               platform : osx-64
             user-agent : conda/4.7.10 requests/2.19.1 CPython/2.7.15 Darwin/18.7.0 OSX/10.14.6
                UID:GID : 1079:20
             netrc file : /Users/jbiard/.netrc
           offline mode : False

[dmlutz2]

Also seeing this issue with tk 8.6.9, trying both python 2.7.15 and 2.7.16, but I don't have full details at the moment

[deeuu]

I can also confirm this, no problem running the demo with8.6.9-ha441bb4_1000 on python 3.7.3/3.6.5:

python -m tkinter

but blank window for later builds.

(I'm on macOS 10.15)

Seems relevent to #36