String.raw Iterator encoding error

[nwind]

What version of Bun is running?

1.2.4+fd9a5ea66

What platform is your computer?

Darwin 24.1.0 x86_64 i386

What steps can reproduce the bug?

When String.raw contain not ASCII text like chinese，Iterator are wrong，like this

const text = String.raw`a中`;

for (const char of text) {
  console.log(char);
}

What is the expected behavior?

Node output is:

a
中

What do you see instead?

Bun output is:

a
\
u
4
E
2
D

Additional information

I also try to using jsc in /System/Library/Frameworks/JavaScriptCore.framework/Versions/A/Helpers/jsc to run this code (change console.log to debug), the output are correct

--> a
--> 中

So I thought the bug is in bun.