386221 - E4X attribute setter returns wrong value

Status: RESOLVED DUPLICATE of bug 312354

(Core :: JavaScript Engine, defect)

Description

[nanto_vi (TOYAMA Nao)]

ECMA-357 2nd 11.6 doesn't deal with a return value of simple assignment expressions.  So |LeftHandSideExpression = AssignmentExpression| should return the value of AssignmentExpression according to ECMA-262 3rd 11.13.1, regardless of whether LeftHandSideExpression is XML/XMLList or not.  But assignment expressions return the value of LeftHandSideExpression when you assign a value to XML attribute.

js> x = <><a>foo</a><a>bar</a></>
<a>foo</a>
<a>bar</a>
js> y = <a/>
js> z = y.@attr = x
foo bar
js> z == x
false

z becomes a string "foo bar" but should become an XMLList <><a>foo</a><a>bar</a></> and z == x should be true.