René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Segfault when using `close_event` with macosx backend and tk","articleBody":"### Bug summary\n\nI periodically try the Macosx backend instead of Tkagg since I'd like to display in retina-quality at some point – and it gets a lot farther now than it used to! – but now the problem is that it segfaults when firing a `close_event`. Crash report below.\n\n### Code for reproduction\n\n```Python\nimport tkinter as tk, random\r\nimport matplotlib, matplotlib.pyplot as plt\r\nmatplotlib.use('macosx') #Works ok with tkagg\r\n\r\ngo = False\r\ndef launch():\r\n    data = []\r\n    globals()['go'] = True\r\n    fig, axes = plt.subplots(1)\r\n    def stop(_): globals()['go'] = False\r\n    fig.canvas.mpl_connect('close_event', stop)\r\n    line, = axes.plot(data, label='Some data', color='#CC0000')\r\n    fig.canvas.draw_idle()\r\n    plt.show(block=False)\r\n\r\n    while globals()['go']:\r\n        data += [random.randint(0,50) for i in range(20)]\r\n\r\n        tseries = range(0, len(data))\r\n        line.set_ydata(data)\r\n        line.set_xdata(tseries)\r\n        axes.relim()\r\n        axes.autoscale_view(tight=False)\r\n\r\n        if fig.stale: fig.canvas.draw()\r\n        fig.canvas.flush_events() #Listen for user input\r\n\r\nwindow = tk.Tk()\r\nrunButton = tk.Button(window, text='Run', command=launch)\r\nrunButton.pack()\r\n\r\nwindow.mainloop()\n```\n\n\n### Actual outcome\n\nProcess:               Python [4760]\r\nPath:                  /Library/Frameworks/Python.framework/Versions/3.12/Resources/Python.app/Contents/MacOS/Python\r\nIdentifier:            org.python.python\r\nVersion:               3.12.3 (3.12.3)\r\nCode Type:             X86-64 (Native)\r\nParent Process:        zsh [4326]\r\nResponsible:           Electron [460]\r\nUser ID:               501\r\n\r\nDate/Time:             2024-07-05 16:48:27.2154 -0400\r\nOS Version:            macOS 14.5 (23F79)\r\nReport Version:        12\r\nBridge OS Version:     8.5 (21P5077)\r\nAnonymous UUID:        8A649286-9529-6CA1-264F-F3369F36AB91\r\n\r\nSleep/Wake UUID:       63FCC38F-5F38-475C-8556-B706B4E6CB1D\r\n\r\nTime Awake Since Boot: 21000 seconds\r\n\r\nSystem Integrity Protection: disabled\r\n\r\nCrashed Thread:        0  Dispatch queue: com.apple.main-thread\r\n\r\nException Type:        EXC_BAD_ACCESS (SIGSEGV)\r\nException Codes:       KERN_INVALID_ADDRESS at 0x0000000000000020\r\nException Codes:       0x0000000000000001, 0x0000000000000020\r\n\r\nTermination Reason:    Namespace SIGNAL, Code 11 Segmentation fault: 11\r\nTerminating Process:   exc handler [4760]\r\n\r\nVM Region Info: 0x20 is not in any region.  Bytes before following region: 4547239904\r\n      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL\r\n      UNUSED SPACE AT START\r\n---\u003e  \r\n      __TEXT                      10f096000-10f09a000    [   16K] r-x/r-x SM=COW  /Library/Frameworks/Python.framework/Versions/3.12/Resources/Python.app/Contents/MacOS/Python\r\n\r\nKernel Triage:\r\nVM - (arg = 0x3) mach_vm_allocate_kernel failed within call to vm_map_enter\n\n### Expected outcome\n\nThe model should stop on close and be able to be relaunched with the run button, as indeed it does with Tkagg.\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nMac OS 14.5 X86\n\n### Matplotlib Version\n\n3.9.1\n\n### Matplotlib Backend\n\nMacosx\n\n### Python version\n\n3.12.3\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/charwick","@type":"Person","name":"charwick"},"datePublished":"2024-07-05T20:53:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/28513/matplotlib/issues/28513"}