Scoping of mixin unlocked from namespaced mixin does not work properly

[SomMeri]

This is probably related to #2038

1.) Mixin unlocked from namespaced mixin does not see callers variables.

Less:

#namespace {
  .unlocker {
    .mixin { 
      property: @variable; 
    }
  }
}
#namespace > .unlocker();

#mixin {
  @variable: in-caller;
  .mixin();
}

actual output:

SyntaxError: variable @variable is undefined in test.less on line 8, column 1:
7 }
8 #namespace > .unlocker();
9

expected output:

#mixin {
  property: in-caller; 
}

2.) I defined a detached ruleset inside a namespaced mixin. The ruleset is unable to see variables defined in its outer namespace (the #2038 is the same except with detached rulesets).

#namespace {
  @variable: in-namespace;
  .unlocker {
    .mixin { 
      property: @variable; 
    }
  }
}
#namespace > .unlocker();

#mixin {
  @variable: another;
  .mixin();
}

actual output:

SyntaxError: variable @variable is undefined in test.less on line 9, column 1:
8 }
9 #namespace > .unlocker();
10

expected output:

#mixin {
  property: in-namespace; 
}

I use node.js with lessc 1.7.0 (LESS Compiler) [JavaScript]

[seven-phases-max]

If I'm not mistaken the (1) error is actually expected since it occurs when the .mixin class is exposed to the global scope where no @variable is defined. I.e. the error is actually in:

#namespace {
  .unlocker {
    .mixin {
      property: @variable; 
    }
  }
}

#namespace > .unlocker();

[seven-phases-max]

And (2) is just one more example for #1316.

[SomMeri]

EDIT: ignore this comment, contains mistakes.

2.) You are right. I forgot about that one.

1.) Mixin should see callers variables. I can not find related discussion now, but I'm sure about it. I will try to find it tomorrow. That being said, this issue has nothing to do with unlocking.

It seems like .mixin { and .mixin() { behave differently. This:

.mixin() { 
  property: @variable; 
}

#usePlace {
  .mixin();
  @variable: in-caller;
}

compiles into:

#usePlace {
  property: in-caller;
}

On the other hand, this fails:

.mixin { 
  property: @variable; 
}

#usePlace {
  .mixin();
  @variable: in-caller;
}

Error:

NameError: variable @variable is undefined in test.less on line 2, column 13:
1 .mixin {
2   property: @variable;
3 }

Do you agree? If yes I will close this issue and open new one for .mixin { vs .mixin() { difference with better title (if it does not exist).

[SomMeri]

Blah, ignore previous comment. Closing issue because 1.) works as expected and 2.) is duplicated.