Strange behavior of the function find() and remove()

[Dennis Ritchie via Digitalmars-d-learn]

This is normal behavior?

import std.stdio;
import std.algorithm;

void main() {

        auto a = [3, 5, 8];

        writeln(find(remove(a, 1), 5).length != 0);     // prints false
        writeln(a);             // prints [3, 8, 8] ???
}