• Node Version: 6.11.3
• NPM Version: 3.10.10
• postcss-less Version: 1.1.1

I pin pointed tokenize-at-rule.js#L36.
When declaration contains a space between variable name and :,
It makes state.cssPart one character to shorter to enter word definition bloc.
Test named parses variables with whitespaces between name and ":", merged in #93, reproduces bug.

LESS

.navbar {
  @borderTopPx : 4px;
  .media {
    i.user {
      margin-top: @borderTopPx + 10px;
    }
  }
}

JavaScript

prettier/prettier#2925

Expected Behavior

@borderTopPx to be handled like a variable.

Actual Behavior

@borderTopPx not handled like a variable.

How can we reproduce the behavior?

I noticed this bug using prettier on Less pasted above.
It is described at prettier/prettier#2925, where @lydell can provide more accurate details about parsing expectations.

Test named parses variables with whitespaces between name and ":" reproduces issue.

Thank for the good work