Comment #4 on issue 2560 by [email protected]: let binding should be
created fresh for every loop iteration
http://code.google.com/p/v8/issues/detail?id=2560
I believe Chakra and V8 are implementing what is currently spec'd unless
I'm interpreting it incorrectly. The latest draft says[1] a single lexical
environment is created for the loop body and that environment is reused
with each iteration. Allen has a note in the Word version[2] that suggests
there hasn't been a final decision on scoping semantics for for-let loops,
though I suspect a change would be pretty difficult at this point...
Thanks for the heads up!
- Brian Terlson
(From Chakra Team)
1.
https://people.mozilla.org/~jorendorff/es6-draft.html#sec-for-statement-runtime-semantics-labelledevaluation
2.
http://wiki.ecmascript.org/lib/exe/fetch.php?id=harmony%3Aspecification_drafts&cache=cache&media=harmony:working_draft_ecma-262_edition_6_10-28-13.doc
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