On 2019-01-14 17:40, Dima Pasechnik wrote:
I am getting a Heisenbug:sage -t --long src/sage/geometry/polyhedron/library.py ********************************************************************** File "src/sage/geometry/polyhedron/library.py", line 398, in sage.geometry.polyhedron.library.Polytopes.icosahedron Failed example: ico.volume() Exception raised: Traceback (most recent call last): File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py", line 671, in _run self.compile_and_execute(example, compiler, test.globs) File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py", line 1086, in compile_and_execute exec(compiled, globs) File "<doctest sage.geometry.polyhedron.library.Polytopes.icosahedron[5]>", line 1, in <module> ico.volume() File "sage/misc/cachefunc.pyx", line 1952, in sage.misc.cachefunc.CachedMethodCaller.__call__ (build/cythonized/sage/misc/cachefunc.c:10324) w = self._instance_call(*args, **kwds) File "sage/misc/cachefunc.pyx", line 1828, in sage.misc.cachefunc.CachedMethodCaller._instance_call (build/cythonized/sage/misc/cachefunc.c:9809) return self.f(self._instance, *args, **kwds) File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/geometry/polyhedron/base.py", line 5039, in volume triangulation = self.triangulate(engine=engine, **kwds) File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/geometry/polyhedron/base.py", line 2837, in triangulate return pc.triangulate() File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/geometry/triangulation/point_configuration.py", line 1092, in triangulate return self.placing_triangulation() File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/geometry/triangulation/point_configuration.py", line 2055, in placing_triangulation for facet in facets_of_simplex(simplex): File "/home/dimpase/sage/local/lib/python2.7/site-packages/sage/geometry/triangulation/point_configuration.py", line 1994, in facets_of_simplex normals = span.inverse().columns() File "sage/matrix/matrix2.pyx", line 8857, in sage.matrix.matrix2.Matrix.inverse (build/cythonized/sage/matrix/matrix2.c:66081) return ~self File "sage/matrix/matrix_double_dense.pyx", line 466, in sage.matrix.matrix_double_dense.Matrix_double_dense.__invert__ (build/cythonized/sage/matrix/matrix_double_dense.c:5933) raise ZeroDivisionError("input matrix must be nonsingular") ZeroDivisionError: input matrix must be nonsingular Perhaps the underlying triangulation code uses some randomisation, getting bad triangulations in this case.
Related? https://trac.sagemath.org/ticket/18214 -- You received this message because you are subscribed to the Google Groups "sage-release" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-release+unsubscr...@googlegroups.com. To post to this group, send email to sage-release@googlegroups.com. Visit this group at https://groups.google.com/group/sage-release. For more options, visit https://groups.google.com/d/optout.
