plot_vector_field unstable

[kliem]

sage -t --long --random-seed=100018246794490849529549460423875336890 src/sage/tests/books/computational-mathematics-with-sagemath/sol/graphique_doctest.py
**********************************************************************
File "src/sage/tests/books/computational-mathematics-with-sagemath/sol/graphique_doctest.py", line 45, in sage.tests.books.computational-mathematics-with-sagemath.sol.graphique_doctest
Failed example:
    g.show()
Exception raised:
    Traceback (most recent call last):
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/doctest/forker.py", line 694, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/doctest/forker.py", line 1088, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.tests.books.computational-mathematics-with-sagemath.sol.graphique_doctest[17]>", line 1, in <module>
        g.show()
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/misc/decorators.py", line 410, in wrapper
        return func(*args, **kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/plot/graphics.py", line 2136, in show
        dm.display_immediately(self, **kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/repl/rich_output/display_manager.py", line 851, in display_immediately
        plain_text, rich_output = self._rich_output_formatter(obj, rich_repr_kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/repl/rich_output/display_manager.py", line 643, in _rich_output_formatter
        rich_output = self._call_rich_repr(obj, rich_repr_kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/repl/rich_output/display_manager.py", line 601, in _call_rich_repr
        return obj._rich_repr_(self, **rich_repr_kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/plot/graphics.py", line 1003, in _rich_repr_
        self.save, kwds, file_ext, output_container)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/repl/rich_output/display_manager.py", line 731, in graphics_from_save
        save_function(filename, **kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/misc/decorators.py", line 410, in wrapper
        return func(*args, **kwds)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/sage/plot/graphics.py", line 3350, in save
        figure.tight_layout()
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/cbook/deprecation.py", line 411, in wrapper
        return func(*inner_args, **inner_kwargs)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/figure.py", line 2615, in tight_layout
        pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/tight_layout.py", line 308, in get_tight_layout_figure
        pad=pad, h_pad=h_pad, w_pad=w_pad)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/tight_layout.py", line 84, in auto_adjust_subplotpars
        bb += [ax.get_tightbbox(renderer, for_layout_only=True)]
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/axes/_base.py", line 4163, in get_tightbbox
        renderer, for_layout_only=for_layout_only)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/axis.py", line 1109, in get_tightbbox
        ticks_to_draw = self._update_ticks()
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/axis.py", line 1021, in _update_ticks
        major_locs = self.get_majorticklocs()
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/axis.py", line 1283, in get_majorticklocs
        return self.major.locator()
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/ticker.py", line 2289, in __call__
        return self.tick_values(vmin, vmax)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/ticker.py", line 2297, in tick_values
        locs = self._raw_ticks(vmin, vmax)
      File "/srv/public/kliem/sage/local/lib/python3.7/site-packages/matplotlib/ticker.py", line 2280, in _raw_ticks
        ticks = np.arange(low, high + 1) * step + best_vmin
    ValueError: arange: cannot compute length

Component: graphics

Issue created by migration from https://trac.sagemath.org/ticket/32657