René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Navigation does not work after figure.clf()","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\n\u003c!--A short 1-2 sentences that succinctly describes the bug--\u003e\r\nNavigation in the zoom stack using the Home, Forward, Backward buttons on the toolbar does not work after the figure is cleared with clf().\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required--\u003e\r\n\r\n```python\r\nplt.plot([1,2,3])\r\nplt.clf()\r\nplt.plot([1,2,3])\r\n# now click the Zoom button and try to zoom in/out on the figure. Then press Home, Forward or Back buttons on the navigation toolbar: nothing happens.\r\n```\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\nThe Home, Forward and Back buttons on the toolbar do not work: the zoom does not change as expected.\r\n\r\n**Expected outcome**\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\nStepping forward and backward in the zoom stack should work as expected when pressing the navigation buttons.\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: Linux 64\r\n  * Matplotlib version: v2.0.2, v2.1.0\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): tried Qt5 and Tk, possibly all others are affected\r\n  * Python version: 3.6\r\n  * Jupyter version (if applicable): -\r\n  * Other libraries: -\r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\nI use conda, python3.6 and matplotlib (v2.0.2)  from the default channel and matplotlib (v2.1.0) from conda-forge.","author":{"url":"https://github.com/awacha","@type":"Person","name":"awacha"},"datePublished":"2017-11-09T12:26:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/9730/matplotlib/issues/9730"}