Details
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Bug
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Resolution: Unresolved
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P2: Important
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None
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5.12.0, 5.12.1
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None
Description
Using the following environment:
- Python interpreter (3.7.2 and 3.6.8) built with
--with-pydebug
,
- matplotlib installed via pip
- PySide2 build from source
--debug --ignore-git --parallel=8 --make-spec=ninja --verbose-build --limited-api=no --skip-modules=RemoteObjects
and trying to run the following code:
import sys import time import numpy as np from matplotlib.backends.qt_compat import QtCore, QtWidgets from matplotlib.backends.backend_qt5agg import FigureCanvas from matplotlib.figure import Figure class ApplicationWindow(QtWidgets.QMainWindow): def __init__(self): super().__init__() self._main = QtWidgets.QWidget() self.setCentralWidget(self._main) layout = QtWidgets.QVBoxLayout(self._main) static_canvas = FigureCanvas(Figure(figsize=(5, 3))) layout.addWidget(static_canvas) dynamic_canvas = FigureCanvas(Figure(figsize=(5, 3))) layout.addWidget(dynamic_canvas) self._static_ax = static_canvas.figure.subplots() t = np.linspace(0, 10, 501) self._static_ax.plot(t, np.tan(t), ".") self._dynamic_ax = dynamic_canvas.figure.subplots() self._timer = dynamic_canvas.new_timer( 100, [(self._update_canvas, (), {})]) self._timer.start() def _update_canvas(self): self._dynamic_ax.clear() t = np.linspace(0, 10, 101) # Shift the sinusoid as a function of time. self._dynamic_ax.plot(t, np.sin(t + time.time())) self._dynamic_ax.figure.canvas.draw() if __name__ == "__main__": print(QtCore.__file__) qapp = QtWidgets.QApplication(sys.argv) app = ApplicationWindow() app.show() qapp.exec_()
(Source: https://matplotlib.org/examples/user_interfaces/embedding_in_qt5.html )
generates a segmentation fault
* ob object : <refcnt 0 at 0x7fb28d5e0e50> type : matplotlib.backends._backend_agg.BufferRegion refcount: 0 address : 0x7fb28d5e0e50 * op->_ob_prev->_ob_next zsh: segmentation fault (core dumped) python matplotlib-pyside.py