Nested classes in combination with @extend generatess invalid css

[ehhc]

Hi,
i would like to compile the following scss:

.font-styles-font1 {
text-transform: uppercase;
font-family: Helvetica,sans-serif;
}
.nav-tabs {
border-bottom: 0;
& > li {
@extend .font-styles-font1;
}
}

i expteced it to generate the following css (according to the official SASS language definition it is valid):

.font-styles-font1, .nav-tabs > li {
text-transform: uppercase;
font-family: Helvetica,sans-serif;
}
.nav-tabs {
border-bottom: 0;
}

unfortunatly i get this css instead:

.font-styles-font1, > li {
text-transform: uppercase;
font-family: Helvetica, sans-serif;
}
.nav-tabs {
border-bottom: 0;
}

this css is NOT valid... there is a selector expected in front of the "> li"-token...

Any suggestions why this happens and how to fix it?

EDIT: I just noticed, that @extend in combination with nested classes allways leads to incorrect CSS. The following example illustrats this:

SASS:

.font-styles-sansbold {
text-transform: uppercase;
font-family: Arial, Helvetica, sans-serif;
}
.alphabetical-list {
li {
@extend .font-styles-sansbold;
display: inline-block;
font-size: 1.333em;
margin-right: 1em;
}
}

Expected CSS (please notice the selectors in the first row!):

.font-styles-sansbold, .alphabetical-list li {
text-transform: uppercase;
font-family: Arial, Helvetica, sans-serif;
}
.alphabetical-list li {
display: inline-block;
font-size: 1.333em;
margin-right: 1em;
}

Falsly generated CSS:

.font-styles-sansbold, li {
text-transform: uppercase;
font-family: Arial, Helvetica, sans-serif;
}
.alphabetical-list li {
display: inline-block;
font-size: 1.333em;
margin-right: 1em;
}

In the first row the .alphabetical-list class name selector is missing. Because of this ALL lis are uppercase etc. This is not intended!

[msosa]

+1
thought it was an issue with the gradle plugin I use to compile but I believe it is the compiler it is using
kravemir/GradleSassPlugin#5

[kravemir]

+1, I have encountered this problem, too. I also use this compiler in my gradle plugin.