René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"constrained_layout fails with hidden axis...","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```python\r\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\n\r\nfig5, axs = plt.subplots(2, 2, constrained_layout=True)\r\n\r\naxs[0,1].set_visible(False)\r\n\r\nplt.show()\r\n```\r\n\r\nwill yield an error:\r\n\r\n```\r\nTraceback (most recent call last):\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/backends/backend_qt5.py\", line 488, in _draw_idle\r\n    self.draw()\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/backends/backend_agg.py\", line 396, in draw\r\n    self.figure.draw(self.renderer)\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/artist.py\", line 38, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/figure.py\", line 1711, in draw\r\n    self.execute_constrained_layout(renderer)\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/figure.py\", line 2433, in execute_constrained_layout\r\n    do_constrained_layout(fig, renderer, h_pad, w_pad, hspace, wspace)\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/_constrained_layout.py\", line 170, in do_constrained_layout\r\n    _make_layout_margins(ax, renderer, h_pad, w_pad)\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/_constrained_layout.py\", line 275, in _make_layout_margins\r\n    bbox = invTransFig(tightbbox)\r\n  File \"/Users/jklymak/matplotlib/lib/matplotlib/transforms.py\", line 1452, in transform_bbox\r\n    return Bbox(self.transform(bbox.get_points()))\r\nAttributeError: 'NoneType' object has no attribute 'get_points'\r\n```\r\n\r\n\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  * Matplotlib version: Master\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","author":{"url":"https://github.com/jklymak","@type":"Person","name":"jklymak"},"datePublished":"2019-07-30T03:16:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/14918/matplotlib/issues/14918"}