at-root does not work if there is an internal if statement

[speedplane]

at-root does not work if there is an internal if statement

input.scss

$bar: true;
p {
    @if $bar {
        @at-root {
            div {
                width: 100px;
            }
        }
    }

    @at-root {
        @if $bar {
            div {
                height: 100px;
            }
        }
    }
}

libsass 3.5.5

div {
  width: 100px;
}

p div {
  height: 100px;
}

Expected result:

div {
  width: 100px;
}

div {
  height: 100px;
}

[mgreter]

Updated the test to also include all? other similar statements:

$bar: true;

@mixin mixin() {
    mix: in;
}

@mixin include() {
    @content;
}

p {
    @at-root {
        @if $bar {
            #if {
                height: 100px;
            }
        }
        @if (not $bar) {
        } @elseif($bar) {
            #elseif {
                width: 100px;
            }
        }
        @if (not $bar) {
        } @else {
            #else {
                width: 100px;
            }
        }
        @for $i from 1 through 1 {
            #for {
                foo: bar#{$i};
            }
        }
        $i: 0;
        @while ($i == 0) {
            $i: $i + 1;
            #while {
                foo: bar#{$i};
            }
        }
        @each $i in (1) {
            #each {
                foo: bar#{$i};
            }
        }
        #inc {
            @include mixin();
            @include include() {
                inc: lude;
            }
        }
        @supports (display: flex) {
            display: flex;
        }
        @foo {
           bar: bat;
        }
    }
}