Loose parser fails to parse ArrayExpression on multiple lines

Using the latest from master parse the following:

var a = [1,
2,
3];

The resulting AST has three root nodes in the body (I would expect only a variableDeclaration node) and has only one element in the elements array of the ArrayExpression node (I would expect three Literal nodes).

Acorn.parse(...) properly parses the same expression correctly.