Fixed nobody to run

src/kernel/thread_manager.rs

@@ -239,7 +239,11 @@ impl ThreadManager {
         while next_thread.is_none() {
             eprintln!("Nobody to run => idle");
             machine.interrupt.idle();
-            next_thread = self.find_next_to_run();
+            if let Some(t) = self.find_next_to_run() {
+                next_thread = Some(t);
+            } else {
+                panic!("Couldn't find next thread to run.\nShutting down...");
+            }
         }
         self.switch_to(machine, Rc::clone(&next_thread.unwrap()));
         

test/riscv_instructions/boolean_logic/comparisons.c

@@ -1,15 +1,13 @@
 int main() {
     int x = 0;
     int y = 1;
-    while (x <= y) {
-        if (x > y) {
-            x += 1;
-        } else if (x == y) {
-            x += y;
-        } else if (x < y) {
-            y += 1;
-        } else {
-            return 0;
-        }
+    if (x > y) {
+        x += 1;
+    }
+    if (x == y) {
+        x += y;
+    }
+    if (x < y) {
+        y += 1;
     }
 }