Nul character in strings is not passed view dart:js callMethod

[DartBot]

This issue was originally filed by chris.e...@gmail.com

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What steps will reproduce the problem?

1. Define a string with a NUL character like: new String.fromCharCodes([82, 0, 82, 82])
2. Send it via a dart:js context.callMethod()
3. Check the value in JavaScript

I expect the NUL character (and everything afterwards) to be sent. This is how JavaScript functions work.

$ dart --version
Dart VM version: 0.8.10.6_r30036 (Thu Nov 7 01:23:45 2013) on "linux_x64"

The attached files will reproduce. The string that I send from Dart has 4 characters, but arrives with one character in the JavaScript function.

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Attachments:
index.html (174 Bytes)
pubspec.yaml (68 Bytes)
read_string.js (75 Bytes)
make_string.dart (171 Bytes)

[anders-sandholm]

Added Area-Library, Library-JS, Triaged labels.