[misc] Deno compatibility: send COM_QUIT synchronously to prevent socket cleanup race condition

Author: rusher

lib/connection.js

@@ -708,8 +708,16 @@ class Connection extends EventEmitter {
       const quitCmd = new Quit(cmdParam, ended, ended);
       this.sendQueue.push(quitCmd);
       this.receiveQueue.push(quitCmd);
+      
+      // Deno compatibility: send QUIT immediately to avoid socket resource cleanup issues
+      const isDeno = typeof Deno !== 'undefined';
       if (this.sendQueue.length === 1) {
-        process.nextTick(this.nextSendCmd.bind(this));
+        if (isDeno) {
+          // Send synchronously in Deno to ensure COM_QUIT is sent before socket cleanup
+          this.nextSendCmd();
+        } else {
+          process.nextTick(this.nextSendCmd.bind(this));
+        }
       }
     } else resolve();
   }
@@ -774,7 +782,12 @@ class Connection extends EventEmitter {
             self.sendQueue.push(quitCmd);
             self.receiveQueue.push(quitCmd);
             if (self.sendQueue.length === 1) {
-              process.nextTick(self.nextSendCmd.bind(self));
+              const isDeno = typeof Deno !== 'undefined';
+              if (isDeno) {
+                self.nextSendCmd();
+              } else {
+                process.nextTick(self.nextSendCmd.bind(self));
+              }
             }
           });
       } else {