scipy/scipy — pull request #112 by WarrenWeckesser (2011-11-26 06:53:46+00:00)
Title: BUG: signal: lfilter would segfault on object arrays (ticket #1452)

See http://projects.scipy.org/scipy/ticket/1452

The fix is to verify that all the objects in the object arrays are numbers. If any are not, a ValueError exception is raised.