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315ec4217f
A memory optimization can use the same pattern expression for many equal pattern list (same parse method, index method and index_smp method). The pattern expression is returned by "pattern_new_expr", but this function dont indicate if the returned pattern is already in use. So, the caller function reload the list of patterns in addition with the existing patterns. This behavior is not a problem with tree indexed pattern, but it grows the lists indexed patterns. This fix add a "reuse" flag in return of the function "pattern_new_expr". If the flag is set, I suppose that the patterns are already loaded. This fix must be backported into 1.5.