experiment: ignore SIGCHLD

src/bin/test-helper/spawner.rs

@@ -8,9 +8,15 @@ use std::fs::OpenOptions;
 use std::process::Command;
 use std::env;
 use rand::Rng;
+use nix::sys::signal;
 
 fn main() -> Result<(), Box<dyn Error>> {
     let args: Vec<String> = env::args().collect();
+
+    unsafe {
+        signal::signal(signal::Signal::SIGCHLD, signal::SigHandler::SigIgn)
+    }.unwrap();
+
     let mut rng = rand::thread_rng();
 
     let log_path = env::var("LOG_PATH")?;