Babel chokes on valid Flow syntax (typeof blah.default) #10571
Description
Bug Report
package.json
{
"devDependencies": {
"@babel/cli": "7.6.4",
"@babel/core": "7.6.4",
"@babel/preset-flow": "7.0.0",
"flow-bin": "0.109.0"
}
}.flowconfig
[include]
src
.babelrc
{
"presets": ["@babel/preset-flow"]
}src/test.js
// @flow
type Stuff = {
x: number,
default: string,
};
function f(stuff: Stuff) {
const x: typeof stuff.x = 1;
const y: typeof stuff.default = "hi";
}Flow runs fine:
$ ./node_modules/.bin/flow
No errors!
Babel does not:
$ ./node_modules/.bin/babel src
{ SyntaxError: /Users/kannan/h/babel-flow-default-token/src/test.js: Unexpected keyword 'default' (9:24)
7 | function f(stuff: Stuff) {
8 | const x: typeof stuff.x = 1;
> 9 | const y: typeof stuff.default = "hi";
| ^
10 | }
11 |
at Object.raise (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:6420:17)
at Object.checkReservedWord (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:9722:12)
at Object.parseIdentifierName (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:9697:12)
at Object.parseIdentifier (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:9667:23)
at Object.flowParseQualifiedTypeIdentifier (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:1595:23)
at Object.flowParseGenericType (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:1605:20)
at Object.flowIdentToTypeAnnotation (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:1713:21)
at Object.flowParsePrimaryType (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:1732:21)
at Object.flowParseTypeofType (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:1617:26)
at Object.flowParsePrimaryType (/Users/kannan/h/babel-flow-default-token/node_modules/@babel/parser/lib/index.js:1862:23)
pos: 142,
loc: Position { line: 9, column: 24 },
code: 'BABEL_PARSE_ERROR' }
My Node version:
$ node --version
v8.15.0
BTW, I know Flow is processing the file because I added a type error to "test.js" and Flow caught it.