Operation

git clone
# install dependencies
cargo build --release

Error

error: no rules expected :
   --> syz_wrapper/src/repro.rs:178:16
    |
178 | let conf = json!({
    | ______________^
179 | | "target": &conf.target,
180 | | "http": "127.0.0.1:65534",
181 | | "workdir": &conf.work_dir,
... |
193 | | });
    | |____^ no rules expected this token in macro call
    |
note: while trying to match =>
   --> /home/parallels/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/simd-json-0.4.15/src/macros.rs:296:46
    |
296 | (@object @count [@entries $(($value:expr => $($key:tt)+))*]) => {
    | ^^
    = note: this error originates in the macro json_internal_owned which comes from the expansion of the macro json (in Nightly builds, run with -Z macro-backtrace for more info)
error: could not compile syz_wrapper (lib) due to 2 previous errors

Solution

Changing simd-json = "0.4" => simd-json = "0.9"

There should be better versions for this.