Fix issue with server not starting before exiting

src/bun.js/api/server.zig

@@ -2053,6 +2053,7 @@ pub fn NewServer(comptime ssl_enabled_: bool, comptime debug_mode_: bool) type {
             if (this.keeping_js_alive) return;
 
             this.vm.us_loop_reference_count +|= 1;
+            this.vm.eventLoop().start_server_on_next_tick = true;
             this.keeping_js_alive = true;
         }
 
@@ -2060,6 +2061,7 @@ pub fn NewServer(comptime ssl_enabled_: bool, comptime debug_mode_: bool) type {
             if (!this.keeping_js_alive) return;
 
             this.vm.us_loop_reference_count -|= 1;
+            this.vm.eventLoop().start_server_on_next_tick = false;
             this.keeping_js_alive = false;
         }
 

src/bun.js/event_loop.zig

@@ -209,6 +209,7 @@ pub const EventLoop = struct {
     global: *JSGlobalObject = undefined,
     virtual_machine: *VirtualMachine = undefined,
     waker: ?AsyncIO.Waker = null,
+    start_server_on_next_tick: bool = false,
     defer_count: std.atomic.Atomic(usize) = std.atomic.Atomic(usize).init(0),
     pub const Queue = std.fifo.LinearFifo(Task, .Dynamic);
 
@@ -353,16 +354,17 @@ pub const EventLoop = struct {
         ctx.global.vm().releaseWeakRefs();
         ctx.global.vm().drainMicrotasks();
 
-        if (ctx.us_loop_reference_count > 0 and !ctx.is_us_loop_entered) {
+        if (ctx.us_loop_reference_count > 0 and !ctx.is_us_loop_entered and (ctx.uws_event_loop.?.num_polls > 0 or this.start_server_on_next_tick)) {
             if (this.tickConcurrentWithCount() > 0) {
                 this.tick();
-            } else if (ctx.uws_event_loop.?.num_polls > 0) {
+            } else {
                 if ((@intCast(c_ulonglong, ctx.uws_event_loop.?.internal_loop_data.iteration_nr) % 1_000) == 1) {
                     _ = ctx.global.vm().runGC(true);
                 }
             }
 
             ctx.is_us_loop_entered = true;
+            this.start_server_on_next_tick = false;
             ctx.enterUWSLoop();
             ctx.is_us_loop_entered = false;
         }

src/bun.js/javascript.zig

@@ -1456,6 +1456,10 @@ pub const VirtualMachine = struct {
 
         this.waitForPromise(promise);
 
+        if (this.eventLoop().start_server_on_next_tick) {
+            this.enterUWSLoop();
+        }
+
         return promise;
     }