Does Truffle support making a programming language in a new character set?

This is with reference to this question. My understanding is tha

Description

When running the testcase below, a SyntaxError exception should be thrown while chakra does not.
According to ES10, the Expression in parentheses of IfStatement should executed based on this step. And a Comma-terminated expression obviously is not belong to valid `E

Example here:
https://github.com/MoarVM/MoarVM/blob/8e078a2fed5225332ed5916d9ce8d3f14954a2fc/src/core/threads.c#L171

The error message appeared during Blin run:

🥞🥞🥞 Testing Benchmark::Plot (new)
⏳ 901 out of 1305 modules processed
🥞🥞🥞 Testing App::Pray (new)
🥞🥞🥞 Testing Cro::HTTP (new)
🥞🥞🥞 Testing Auth::SCRAM (new)
🥞🥞🥞 Testing CPAN::Uploader::Tiny (new)
MoarVM panic: Could not spaw