Parsing nested SASS causes errors when linting

[corroded]

I might be in the minority here of using SASS over SCSS but the linter just dies when parsing certain nested keywords:

stylelint css/base/_typography.sass
Error: Expected pseudo-class or pseudo-element
    at new error (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/processor.js:29:23)
    at Parser.error (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/parser.js:234:15)
    at Parser.pseudo (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/parser.js:332:25)
    at Parser.parse (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/parser.js:549:22)
    at Parser.loop (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/parser.js:517:18)
    at new Parser (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/parser.js:104:21)
    at Processor.process (/Users/my_project/assets/node_modules/stylelint-rscss/node_modules/postcss-selector-parser/dist/processor.js:26:21)
    at flattenRule (/Users/my_project/assets/node_modules/stylelint-rscss/lib/helpers/flatten_rule.js:16:6)
    at visitRule (/Users/my_project/assets/node_modules/stylelint-rscss/lib/helpers/walk_selectors.js:40:5)
    at visit (/Users/my_project/assets/node_modules/stylelint-rscss/lib/helpers/walk_selectors.js:23:20)

Upon further investigation, it looks like it breaks on this:

// has a sad D:
.my-component
  font:
    weight: 800

// happy days
.my-component
  font-weight: 800

It also notably fails on:

.fail-component
  padding:
    top: 1rem

// not tested, but theoretically:
.might-die
  margin: auto
    bottom: 0