René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"inset_locator.mark_inset() misplaces box connectors","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\n`inset_locator.mark_inset()` sometimes misplaces the box connector lines if x/y limits on the parent `Axes` have not been explicitly set. Updating the plot (e.g. by saving the figure) seems to fix it.\r\n\r\n**Code for reproduction**\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport mpl_toolkits.axes_grid1.inset_locator as miloc\r\n\r\nfig, (inset, full) = plt.subplots(ncols=2)\r\n\r\n# swapping the axes makes the example work\r\n# full, inset = inset, full\r\n\r\nfull.plot([-1, 0], [-1, 0])\r\ninset.set_xlim(-0.6, -0.4)\r\ninset.set_ylim(-0.6, -0.4)\r\n\r\n# workaround\r\n# full.set_xlim(-1.0, 0.0)\r\n# full.set_ylim(-1.0, 0.0)\r\n\r\nmiloc.mark_inset(full, inset, 1, 4)\r\nfig.savefig('Bug.png')\r\n# saving the figure a second time produces the expected result\r\nfig.savefig('NoBug.png')\r\n```\r\n\r\n**Actual outcome**\r\n\r\n![Bug](https://user-images.githubusercontent.com/3749578/85268866-619cdf00-b477-11ea-8899-ca66f7be435a.png)\r\n\r\n**Expected outcome**\r\n\r\n![NoBug](https://user-images.githubusercontent.com/3749578/85268916-71b4be80-b477-11ea-9bfc-e0c7d1b0af17.png)\r\n\r\nThis issue was not present in version 3.0.2.\r\n\r\n**Matplotlib version**\r\n\r\n  * Operating system: Fedora and Debian\r\n  * Matplotlib version: 3.2.1 and 3.2.2\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): `Qt5Agg` and `agg`\r\n  * Python version: 3.8\r\n  * Jupyter version (if applicable): N/A\r\n  * Other libraries: N/A\r\n\r\nInstalled via pip on Debian and both pip and dnf on Fedora.","author":{"url":"https://github.com/joreiff","@type":"Person","name":"joreiff"},"datePublished":"2020-06-22T09:06:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/17711/matplotlib/issues/17711"}