The compiler outputs garbled characters

[paintedveil5]

Hi, I tried the compiler and it generated garbled characters.
My input file is shown as:

let a=1;

I ran the command "node main.js input.js output.fuzzil.protobuf".
The output looks like:

^R^G
^A^@*^B^H^A

Did I do something wrong?

[paintedveil5]

The output is correct, because it's a .fzil file. Why can't I delete the issue...