Multiple mixin "return values" in the same scope

[kbdsbx]

.test( @a, @b ) {
    @x : @a;
    @y : @b;
}

.test2 {
    .test( 15px, 20px );
    margin: @x @y;

    .test( 20px, 25px );
    margin: @x @y;
}

It must be:

.test2 {
    margin: 20px 25px;
}

but now it is:

.test2 {
    margin: 15px 20px;
}

[seven-phases-max]

It must be:

No, the result is actually expected since variables in Less are lazy-evaluated and overridable
(it's actually quite important aspect of the language to understand, for more details see:

• Lazy-Evaluation
• Variable Semantics
• The World's Most Misunderstood...)

For a simple workaround of your example see #538 (comment).
For real functions use less-plugin-functions (so far at least).

---

Btw., it's also important to realize that mixins and functions are different things. Mixins are not functions, they can be used as such to a certain degree, but still different beasts, so in general one is better to avoid using these words as synonyms as this will be quite misdirecting and confusing (for himself primarily).

[seven-phases-max]

Closing as expected behaviour (#538, less/less-meta#16).