375641 - Function decompilation throws away high bytes of characters in regexp literals

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Jesse Ruderman]

Function decompilation screws up when unicode characters appear in regular expression literals:

js> uneval(uneval(eval("(function () { return /\u3059/ })")))
"(function () {return /Y/;})"

In contrast, it works fine for direct uneval of a regexp:

js> uneval(uneval(eval("/\u3059/")))
"/\u3059/"

Comment 2

[Jesse Ruderman]

This is especially nasty when it collapses to the null character:

js> eval("(function() { /\u3000/.exec(s) })")
(function () {/.exec(s);})

js> eval("(function() { /\u0000/.exec(s) })") 
(function () {/.exec(s);})