Log by redirecting stderr, this helps to log panics in goroutines

https://stackoverflow.com/a/34773942/1655275

Author: cmaglie

Diff for: main.go

@@ -38,18 +38,22 @@ func main() {
 
 	if enableLogging {
 		logfile := streams.OpenLogFileAs("inols-err.log")
+		// log.SetOutput(io.MultiWriter(logfile, os.Stderr))
 		defer func() {
-			// In case of panic output the stack trace in the log file before exiting
-			if r := recover(); r != nil {
-				log.Println(string(debug.Stack()))
-			}
+			// // In case of panic output the stack trace in the log file before exiting
+			// if r := recover(); r != nil {
+			// 	log.Println(string(debug.Stack()))
+			// }
+
 			logfile.Close()
 		}()
-		log.SetOutput(io.MultiWriter(logfile, os.Stderr))
+		err := syscall.Dup2(int(logfile.Fd()), int(os.Stderr.Fd()))
+		if err != nil {
+			log.Fatalf("Failed to redirect stderr to file: %v", err)
+		}
 		// log.SetOutput(logfile)
-	} else {
-		log.SetOutput(os.Stderr)
 	}
+	log.SetOutput(os.Stderr)
 
 	handler.Setup(cliPath, clangdPath, enableLogging, true)
 	initialBoard := lsp.Board{Fqbn: initialFqbn, Name: initialBoardName}