fix: keep new functions always as reachable.

Author: rzvxa

crates/oxc_semantic/src/control_flow/builder/mod.rs

@@ -111,7 +111,9 @@ impl<'a> ControlFlowGraphBuilder<'a> {
     }
 
     pub fn add_edge(&mut self, a: BasicBlockId, b: BasicBlockId, weight: EdgeType) {
-        if self.basic_block(a).unreachable {
+        if matches!(weight, EdgeType::NewFunction) {
+            self.basic_block_mut(b).unreachable = false;
+        } else if self.basic_block(a).unreachable {
             if self.graph.edges_directed(b, Direction::Incoming).count() == 0 {
                 self.basic_block_mut(b).unreachable = true;
             }