79353 2012-02-23 02:48:31 -0800 Use Unicode 6.1.0 when determining whether an identifier is acceptable or not 2012-02-28 09:10:51 -0800 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) All All UNCONFIRMED P2 Normal --- 0 mathias webkit-unassigned ap barraclough jwalden+bwo mathias oliver oldest_to_newest 562997 0 mathias 2012-02-23 02:48:31 -0800 JavaScript currently uses an older version of the Unicode database. Here are some examples of identifiers that are currently failing because of this, even though they’re valid according to ES 5.1/Unicode 6.1: * `var \u0cf1;` — http://mothereff.in/js-variables#%5Cu0cf1 * `var \ua7aa;` — http://mothereff.in/js-variables#%5Cua7aa * `var \u1bba;` — http://mothereff.in/js-variables#%5Cu1bba * `var a\ua674;` — http://mothereff.in/js-variables#a%5Cua674 Of course, there are many more. Updating to Unicode 6.1 would improve interoperability. Is the list of allowed characters in `IdentifierStart` and `IdentifierPart` auto-generated based on a UnicodeData.txt file, or how is this done in JavaScriptCore?