PSPP-BUG: Assertion failed in array.c:796

[Brent Spillner]

PSPP> compute serious=screened<>'UNK' AND corec='XO'
    > .
PSPP> crosstabs /tables=screened by serious.
pspp: src/libpspp/array.c:796: sort: Assertion `is_sorted (array,
count, size, compare, aux)' failed.
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proximate cause:     Assertion Failure/Abort
version:             GNU pspp 0.6.1 (Sat Nov  7 05:11:53 UTC 2009).
host_system:         i486-pc-linux-gnu
build_system:        i486-pc-linux-gnu
default_config_path: $HOME/.pspp:/etc/pspp
include_path:        ./:$HOME/.pspp/include:/usr/share/pspp
locale_dir:          /usr/share/locale
compiler version:    4.4.1
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