#90 contrary to documentation "name" option to [ns_set create] is not optional.

[Poor Yorick]

When an even number of arguments are passed to [ns_set create], the first is
name of the set, remaining arguments at even indices become keys in the set,
arguments at odd indices become the values of those keys, and the the value of
the last key becomes the empty string.

Instead, an even number of arguments should represent be key-value pairs, and
the name should be automatically generated.

[gustafn]

Many thanks for the report. This has been fixed apparently some time ago.