[Bro] string_to_pattern

[Robin Sommer]

On Fri, Jun 09, 2017 at 21:21 -0700, Dk Jack wrote:

> 1320279566.452687 error in ././trybro.bro, line 17: string_to_pattern
> can only be called at init time (string_to_pattern(Hello, World, T))

Bro currently doesn't support creating regular expressions values
dynamically during runtime. The reason is an unfortunate internal
deficiency: regexp values don't fully clean up their memory when
deleted, meaning that frequent instantiating/destroying would lead to
significant memory leaks.

Robin

-- 
Robin Sommer * ICSI/LBNL * robin at icir.org * www.icir.org/robin