Error parsing properties starting with operator (-/+)

[AndyOGo]

Unfortunately using - operator in SASS causes this bug.

$width: 10;

.test{
          margin-left: - 54 * $width - 1;
 }

Quick fixed with brackets:

$width: 10;

.test{
          margin-left: - (54 * $width - 1);
 }

[QuLogic]

Huh, mathematically speaking, I'd have thought that - was a unary minus and applied to the 54, not the entire expression...

[AndyOGo]

Well thats exactly my point.

Sorry for my "quick fix" being confusing. This should just expose that build works fine with brackets but not without them.

[xzyfer]

This doesn't work in ruby sass 3.4

Confirmed https://gist.github.com/xzyfer/6c396ae79e4de601edc9

Please open the issue on https://github.com/sass/sass

[AndyOGo]

@xzyfer
Well I know that it works with ruby based SASS parser.

But a soon as try to compile with libsass it fails on that line:(

[xzyfer]

@AndyOGo sorry you're correct. I failed at copy-paste.

[xzyfer]

Spec added sass/sass-spec#102

[mgreter]

The basic problem is that either + 0 and - 0 is not parsed correctly. Maybe the spec should be updated to include that case too!? IMHO this could be treated like an op with left hand side set to 0.