message: fixup! fix tests
diff: @@ -196,6 +196,12 @@ impl<'a, I: Input> Parser<'a, I> {
  syntax_error!(span, SyntaxError::NotSimpleAssign)
  }
  match expr.node {
  + // It is a Syntax Error if the LeftHandSideExpression is
  + // CoverParenthesizedExpressionAndArrowParameterList:(Expression) and
  + // Expression derives a phrase that would produce a Syntax Error according
  + // to these rules if that phrase were substituted for
  + // LeftHandSideExpression. This rule is recursively applied.
  + ExprKind::Paren(expr) => return self.reparse_expr_as_pat(pat_ty, expr),
  ExprKind::Ident(i) => return Ok(i.into()),
  _ => {
  return Ok(Pat {
  @@ -249,17 +255,7 @@ impl<'a, I: Input> Parser<'a, I> {
  }
  match expr.node {
  - ExprKind::Paren(inner) => {
  - if pat_ty == PatType::AssignPat {
  - let inner_pat = self.reparse_expr_as_pat(pat_ty, inner)?;
  - return Ok(Pat {
  - span,
  - node: inner_pat.node,
  - });
  - } else {
  - syntax_error!(span, SyntaxError::InvalidPat)
  - }
  - }
  + ExprKind::Paren(inner) => syntax_error!(span, SyntaxError::InvalidPat),
  ExprKind::Assign(AssignExpr {
  left,
  op: Assign,
  