Input Code

export async function foo() {}
export default async function bar() {}

See https://astexplorer.net/#/V8ggvAMIw1

Babylon/Babel Configuration

Experimenting on AST explorer with babylon6-6.13.1 and all default options.

Expected Behavior

The second line should be parsed as an ExportDefaultDeclaration and a FunctionDeclaration.

Current Behavior

The second line is being parsed as an ExportDefaultDeclaration and a FunctionExpression.

A named export with a function declaration leads to FunctionDeclaration whenever it's regular, async or generator function.

But a default export with a function declaration leads to FunctionDeclaration only when it's regular or generator function. Async functions lead to FunctionExpression. I guess that's a bug.