[Donot merge] intro a buggy comment

[Lalitha-Iyer]

Repro to demo a bug with the relay compiler
Bug: Adding Unicode characters in comments ( 🐛), causes the Relay compiler to error

Looking at the graphql spec notes, this feels like a bug.

How to repro

yarn build the todo example.

Error

[INFO] [default] compiling...
thread 'main' panicked at 'internal error: entered unreachable code', crates/graphql-syntax/src/lexer.rs:169:40
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error Command failed with exit code 101.

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[captbaritone]

Thanks for the repro! Is there an issue in the main repository for this?

[Lalitha-Iyer]

Yes, there is an issue in the main repo
facebook/relay#4044