add message instead of assert

src/main.rs

@@ -21,7 +21,9 @@ fn p(n: f64) -> f64 {
 
 fn main() {
 
-    assert!(set_current_thread_priority(ThreadPriority::Max).is_ok());
+    if set_current_thread_priority(ThreadPriority::Max).is_err() {
+        eprintln!("failed to set thread priority to max");
+    }
 
     /* 
     let mut buffer = String::new();
@@ -55,7 +57,9 @@ fn main() {
         let arcclone = primearc.clone();
         let tprimes = thread::spawn(move || {
 
-            assert!(set_current_thread_priority(ThreadPriority::Max).is_ok());
+            if set_current_thread_priority(ThreadPriority::Max).is_err() {
+                eprintln!("failed to set thread priority to max");
+            }
 
             let one_thousand = &BigUint::from(1_000u16);
             let one_hundred = &BigUint::from(100u8);