Object property shorthand fails with `ios >= 9`

[mischnic]

var x = {
  get() {
    return 123;
  },
};

var i = 123;
var v = {
  i,
};

appears to be supported by ios 9: https://caniuse.com/?search=object+shorthand

but fails with es-check 9.6.2:

$ node_modules/.bin/es-check checkBrowser y.js --browserslistQuery="ios >= 9" --noCache
info: ES-Check: checking 1 file...
error: ES-Check: there were 1 ES version matching errors.
info: 
      ES-Check Error:
      ----
      · erroring file: y.js at y.js:3:3
      · error: SyntaxError: Unexpected token (3:3)
      · see the printed err.stack below for context
      ----

      SyntaxError: Unexpected token (3:3)
    at pp$4.raise (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:3766:15)
    at pp$9.unexpected (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:799:10)
    at pp$5.parsePropertyValue (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:3476:19)
    at pp$5.parseProperty (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:3420:10)
    at pp$5.parseObj (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:3375:23)
    at pp$5.parseExprAtom (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:3076:19)
    at pp$5.parseExprSubscripts (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:2884:21)
    at pp$5.parseMaybeUnary (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:2842:19)
    at pp$5.parseExprOps (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:2770:21)
    at pp$5.parseMaybeConditional (node_modules/.pnpm/acorn@8.16.0/node_modules/acorn/dist/acorn.js:2753:21)