Selector interpolation breaks chunk and results in "Unrecognized input"

[kasparsz]

When less is divided into chunks in parser.js, "}" symbols can end chunk, but it doesn't take into account selector interpolation, so chunk can end right after selector "@{selector}", before opening "{".

Test:

@selector: "div";

/*
whole comment is in a single chunk, so chunk will be "closed" as soon as possible
blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank
blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank
blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank
blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank
blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank blank
*/
@{selector} {
  color: red;
}

Result:
Unrecognized input

Reproducible in 1.6.0 and .1.6.1, before that was working as expected.

[lukeapage]

thanks for the report. It wasn't quite what you suggested but I fixed it and added a test to stop regressions.