Only register the CTRL-C handler when it's safe to do so.

src/bin/julialauncher.rs

@@ -301,10 +301,6 @@ fn run_app() -> Result<i32> {
  }
  }
 
- // We set a Ctrl-C handler here that just doesn't do anything, as we want the Julia child
- // process to handle things.
- ctrlc::set_handler(|| ()).with_context(|| "Failed to set the Ctrl-C handler.")?;
-
  // On *nix platforms we replace the current process with the Julia one.
  // This simplifies use in e.g. debuggers, but requires that we fork off
  // a subprocess to do the selfupdate and versiondb update.
@@ -350,6 +346,11 @@ fn run_app() -> Result<i32> {
  // any typical daemon-y things (like detaching the TTY)
  // so that any error output is still visible.
 
+ // We set a Ctrl-C handler here that just doesn't do anything, as we want the Julia child
+ // process to handle things.
+ ctrlc::set_handler(|| ())
+ .with_context(|| "Failed to set the Ctrl-C handler.")?;
+
  run_versiondb_update(&config_file)
  .with_context(|| "Failed to run version db update")?;
 
@@ -366,6 +367,10 @@ fn run_app() -> Result<i32> {
  // On other platforms (i.e., Windows) we just spawn a subprocess
  #[cfg(windows)]
  {
+ // We set a Ctrl-C handler here that just doesn't do anything, as we want the Julia child
+ // process to handle things.
+ ctrlc::set_handler(|| ()).with_context(|| "Failed to set the Ctrl-C handler.")?;
+
  let mut child_process = std::process::Command::new(julia_path)
  .args(&new_args)
  .spawn()