Array destructuring executes the expression twice

[GoogleCodeExporter]

Given:

var [x = 42] = ([].concat(1));

Generates:

var x = 0 in ([].concat(1)) ? ([].concat(1))[0]: 42;

We need to introduce a temp variable here.

Original issue reported on code.google.com by arv@chromium.org on 31 Jan 2013 at 12:15

[GoogleCodeExporter]

https://code.google.com/p/traceur-compiler/source/detail?r=69a46675151c315dcccf7
11e6f31bf060d190899

Original comment by arv@google.com on 7 Feb 2013 at 9:24

• Changed state: Fixed
• Added labels: ****
• Removed labels: ****