prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Segfault when exiting Command Line Usage Example
  <!-- In the following, please describe your issue in detail! -->
  <!-- If some of the sections do not apply, just remove them. -->
  
  ### Short description
  When Running the command line example, and closing the window, I get a segmentation fault
  
  ### Code to reproduce
  <!-- Please provide a minimal working example that reproduces the issue in the code block below.
       Ideally, this should be a full example someone else could run without additional setup. -->
  ```bash
  python -m pyqtgraph.examples
  ```
  
  Run the command line usage example, and close out the window.
  
  
  ### Expected behavior
  Window closes
  
  ### Real behavior
  Window closes, generates a segfault
  
  ```
  /usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/runpy.py:125: RuntimeWarning: 'pyqtgraph.examples.__main__' found in sys.modules after import of package 'pyqtgraph.examples', but prior to execution of 'pyqtgraph.examples.__main__'; this may result in unpredictable behaviour
    warn(RuntimeWarning(msg))
  qt.qpa.fonts: Populating font family aliases took 246 ms. Replace uses of missing font family "FreeMono" with one that exists to avoid this cost.
  Using PyQt5 (default graphics system)
  Fatal Python error: Segmentation fault
  
  Current thread 0x000000010840bdc0 (most recent call first):
    File "/Users/ognyan/Developer/pyqtgraph/.venv/lib/python3.7/site-packages/pyqtgraph/examples/CLIexample.py", line 26 in <module>
  ```
  
  ### Tested environment(s)
  
   * PyQtGraph version: 0.11
   * Qt Python binding: PySide2 5.15.0 and PyQt5 5.15.0
   * Python version: 3.7.7
   * NumPy version: 1.18.4
   * Operating system: macOS Catalina
   * Installation method: pip
  
  ### Additional context
  
  This is not an issue with 0.11.rc0
  
  </issue>
  <code>
  [start of pyqtgraph/graphicsWindows.py]
  1 # -*- coding: utf-8 -*-
  2 """
  3 DEPRECATED:  The classes below are convenience classes that create a new window
  4 containting a single, specific widget. These classes are now unnecessary because
  5 it is possible to place any widget into its own window by simply calling its
  6 show() method.
  7 """
  8 
  9 from .Qt import QtCore, QtGui, mkQApp
  10 from .widgets.PlotWidget import *
  11 from .imageview import *
  12 from .widgets.GraphicsLayoutWidget import GraphicsLayoutWidget
  13 from .widgets.GraphicsView import GraphicsView
  14 
  15 
  16 class GraphicsWindow(GraphicsLayoutWidget):
  17     """
  18     (deprecated; use :class:`~pyqtgraph.GraphicsLayoutWidget` instead)
  19     
  20     Convenience subclass of :class:`~pyqtgraph.GraphicsLayoutWidget`. This class
  21     is intended for use from the interactive python prompt.
  22     """
  23     def __init__(self, title=None, size=(800,600), **kargs):
  24         mkQApp()
  25         GraphicsLayoutWidget.__init__(self, **kargs)
  26         self.resize(*size)
  27         if title is not None:
  28             self.setWindowTitle(title)
  29         self.show()
  30         
  31 
  32 class TabWindow(QtGui.QMainWindow):
  33     """
  34     (deprecated)
  35     """
  36     def __init__(self, title=None, size=(800,600)):
  37         mkQApp()
  38         QtGui.QMainWindow.__init__(self)
  39         self.resize(*size)
  40         self.cw = QtGui.QTabWidget()
  41         self.setCentralWidget(self.cw)
  42         if title is not None:
  43             self.setWindowTitle(title)
  44         self.show()
  45         
  46     def __getattr__(self, attr):
  47         return getattr(self.cw, attr)
  48     
  49 
  50 class PlotWindow(PlotWidget):
  51     sigClosed = QtCore.Signal(object)
  52 
  53     """
  54     (deprecated; use :class:`~pyqtgraph.PlotWidget` instead)
  55     """
  56     def __init__(self, title=None, **kargs):
  57         mkQApp()
  58         PlotWidget.__init__(self, **kargs)
  59         if title is not None:
  60             self.setWindowTitle(title)
  61         self.show()
  62 
  63     def closeEvent(self, event):
  64         PlotWidget.closeEvent(self, event)
  65         self.sigClosed.emit(self)
  66 
  67 
  68 class ImageWindow(ImageView):
  69     sigClosed = QtCore.Signal(object)
  70 
  71     """
  72     (deprecated; use :class:`~pyqtgraph.ImageView` instead)
  73     """
  74     def __init__(self, *args, **kargs):
  75         mkQApp()
  76         ImageView.__init__(self)
  77         if 'title' in kargs:
  78             self.setWindowTitle(kargs['title'])
  79             del kargs['title']
  80         if len(args) > 0 or len(kargs) > 0:
  81             self.setImage(*args, **kargs)
  82         self.show()
  83 
  84     def closeEvent(self, event):
  85         ImageView.closeEvent(self, event)
  86         self.sigClosed.emit(self)
  87
  [end of pyqtgraph/graphicsWindows.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/pyqtgraph/graphicsWindows.py b/pyqtgraph/graphicsWindows.py
  --- a/pyqtgraph/graphicsWindows.py
  +++ b/pyqtgraph/graphicsWindows.py
  @@ -55,10 +55,14 @@
       """
       def __init__(self, title=None, **kargs):
           mkQApp()
  +        self.win = QtGui.QMainWindow()
           PlotWidget.__init__(self, **kargs)
  +        self.win.setCentralWidget(self)
  +        for m in ['resize']:
  +            setattr(self, m, getattr(self.win, m))
           if title is not None:
  -            self.setWindowTitle(title)
  -        self.show()
  +            self.win.setWindowTitle(title)
  +        self.win.show()
   
       def closeEvent(self, event):
           PlotWidget.closeEvent(self, event)
  @@ -73,14 +77,20 @@
       """
       def __init__(self, *args, **kargs):
           mkQApp()
  -        ImageView.__init__(self)
  +        self.win = QtGui.QMainWindow()
  +        self.win.resize(800,600)
           if 'title' in kargs:
  -            self.setWindowTitle(kargs['title'])
  +            self.win.setWindowTitle(kargs['title'])
               del kargs['title']
  +        ImageView.__init__(self, self.win)
           if len(args) > 0 or len(kargs) > 0:
               self.setImage(*args, **kargs)
  -        self.show()
  -
  +        
  +        self.win.setCentralWidget(self)
  +        for m in ['resize']:
  +            setattr(self, m, getattr(self.win, m))
  +        self.win.show()
  +    
       def closeEvent(self, event):
           ImageView.closeEvent(self, event)
           self.sigClosed.emit(self)
  
verification_info: {"golden_diff": "diff --git a/pyqtgraph/graphicsWindows.py b/pyqtgraph/graphicsWindows.py\n--- a/pyqtgraph/graphicsWindows.py\n+++ b/pyqtgraph/graphicsWindows.py\n@@ -55,10 +55,14 @@\n     \"\"\"\n     def __init__(self, title=None, **kargs):\n         mkQApp()\n+        self.win = QtGui.QMainWindow()\n         PlotWidget.__init__(self, **kargs)\n+        self.win.setCentralWidget(self)\n+        for m in ['resize']:\n+            setattr(self, m, getattr(self.win, m))\n         if title is not None:\n-            self.setWindowTitle(title)\n-        self.show()\n+            self.win.setWindowTitle(title)\n+        self.win.show()\n \n     def closeEvent(self, event):\n         PlotWidget.closeEvent(self, event)\n@@ -73,14 +77,20 @@\n     \"\"\"\n     def __init__(self, *args, **kargs):\n         mkQApp()\n-        ImageView.__init__(self)\n+        self.win = QtGui.QMainWindow()\n+        self.win.resize(800,600)\n         if 'title' in kargs:\n-            self.setWindowTitle(kargs['title'])\n+            self.win.setWindowTitle(kargs['title'])\n             del kargs['title']\n+        ImageView.__init__(self, self.win)\n         if len(args) > 0 or len(kargs) > 0:\n             self.setImage(*args, **kargs)\n-        self.show()\n-\n+        \n+        self.win.setCentralWidget(self)\n+        for m in ['resize']:\n+            setattr(self, m, getattr(self.win, m))\n+        self.win.show()\n+    \n     def closeEvent(self, event):\n         ImageView.closeEvent(self, event)\n         self.sigClosed.emit(self)\n", "issue": "Segfault when exiting Command Line Usage Example\n<!-- In the following, please describe your issue in detail! -->\r\n<!-- If some of the sections do not apply, just remove them. -->\r\n\r\n### Short description\r\nWhen Running the command line example, and closing the window, I get a segmentation fault\r\n\r\n### Code to reproduce\r\n<!-- Please provide a minimal working example that reproduces the issue in the code block below.\r\n     Ideally, this should be a full example someone else could run without additional setup. -->\r\n```bash\r\npython -m pyqtgraph.examples\r\n```\r\n\r\nRun the command line usage example, and close out the window.\r\n\r\n\r\n### Expected behavior\r\nWindow closes\r\n\r\n### Real behavior\r\nWindow closes, generates a segfault\r\n\r\n```\r\n/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/runpy.py:125: RuntimeWarning: 'pyqtgraph.examples.__main__' found in sys.modules after import of package 'pyqtgraph.examples', but prior to execution of 'pyqtgraph.examples.__main__'; this may result in unpredictable behaviour\r\n  warn(RuntimeWarning(msg))\r\nqt.qpa.fonts: Populating font family aliases took 246 ms. Replace uses of missing font family \"FreeMono\" with one that exists to avoid this cost.\r\nUsing PyQt5 (default graphics system)\r\nFatal Python error: Segmentation fault\r\n\r\nCurrent thread 0x000000010840bdc0 (most recent call first):\r\n  File \"/Users/ognyan/Developer/pyqtgraph/.venv/lib/python3.7/site-packages/pyqtgraph/examples/CLIexample.py\", line 26 in <module>\r\n```\r\n\r\n### Tested environment(s)\r\n\r\n * PyQtGraph version: 0.11\r\n * Qt Python binding: PySide2 5.15.0 and PyQt5 5.15.0\r\n * Python version: 3.7.7\r\n * NumPy version: 1.18.4\r\n * Operating system: macOS Catalina\r\n * Installation method: pip\r\n\r\n### Additional context\r\n\r\nThis is not an issue with 0.11.rc0\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\n\"\"\"\nDEPRECATED:  The classes below are convenience classes that create a new window\ncontainting a single, specific widget. These classes are now unnecessary because\nit is possible to place any widget into its own window by simply calling its\nshow() method.\n\"\"\"\n\nfrom .Qt import QtCore, QtGui, mkQApp\nfrom .widgets.PlotWidget import *\nfrom .imageview import *\nfrom .widgets.GraphicsLayoutWidget import GraphicsLayoutWidget\nfrom .widgets.GraphicsView import GraphicsView\n\n\nclass GraphicsWindow(GraphicsLayoutWidget):\n    \"\"\"\n    (deprecated; use :class:`~pyqtgraph.GraphicsLayoutWidget` instead)\n    \n    Convenience subclass of :class:`~pyqtgraph.GraphicsLayoutWidget`. This class\n    is intended for use from the interactive python prompt.\n    \"\"\"\n    def __init__(self, title=None, size=(800,600), **kargs):\n        mkQApp()\n        GraphicsLayoutWidget.__init__(self, **kargs)\n        self.resize(*size)\n        if title is not None:\n            self.setWindowTitle(title)\n        self.show()\n        \n\nclass TabWindow(QtGui.QMainWindow):\n    \"\"\"\n    (deprecated)\n    \"\"\"\n    def __init__(self, title=None, size=(800,600)):\n        mkQApp()\n        QtGui.QMainWindow.__init__(self)\n        self.resize(*size)\n        self.cw = QtGui.QTabWidget()\n        self.setCentralWidget(self.cw)\n        if title is not None:\n            self.setWindowTitle(title)\n        self.show()\n        \n    def __getattr__(self, attr):\n        return getattr(self.cw, attr)\n    \n\nclass PlotWindow(PlotWidget):\n    sigClosed = QtCore.Signal(object)\n\n    \"\"\"\n    (deprecated; use :class:`~pyqtgraph.PlotWidget` instead)\n    \"\"\"\n    def __init__(self, title=None, **kargs):\n        mkQApp()\n        PlotWidget.__init__(self, **kargs)\n        if title is not None:\n            self.setWindowTitle(title)\n        self.show()\n\n    def closeEvent(self, event):\n        PlotWidget.closeEvent(self, event)\n        self.sigClosed.emit(self)\n\n\nclass ImageWindow(ImageView):\n    sigClosed = QtCore.Signal(object)\n\n    \"\"\"\n    (deprecated; use :class:`~pyqtgraph.ImageView` instead)\n    \"\"\"\n    def __init__(self, *args, **kargs):\n        mkQApp()\n        ImageView.__init__(self)\n        if 'title' in kargs:\n            self.setWindowTitle(kargs['title'])\n            del kargs['title']\n        if len(args) > 0 or len(kargs) > 0:\n            self.setImage(*args, **kargs)\n        self.show()\n\n    def closeEvent(self, event):\n        ImageView.closeEvent(self, event)\n        self.sigClosed.emit(self)\n", "path": "pyqtgraph/graphicsWindows.py"}]}