Njs: incorrect parsing of UTF-16 escape sequences

[drsm]

$ cat u16.js 
var s0 = 'фыва asdf 👍';
var s1 = '\u0444\u044b\u0432\u0430 asdf \ud83d\udc4d';
var s2 = JSON.parse('"\\u0444\\u044b\\u0432\\u0430 asdf \\ud83d\\udc4d"');
console.log(s0, '|', s1, '|', s2);
$ build/njs u16.js 
'фыва asdf 👍' '|' 'фыва asdf ������' '|' 'фыва asdf 👍'

[hongzhidao]

@drsm I'm courious how do you find this issue?

[drsm]

@hongzhidao
i've just made a mistake there :) .
then fix it, and hit the bug

[lexborisov]

@drsm

Please, try this patch to fix the problem.

[drsm]

@lexborisov

Thank you for the patch, works fine for me '\ud83d\udc4d \u{1f44d}'!

[drsm]

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