Bad example patch against https://github.com/open-telemetry/opentelemetry-go-contrib/tree/6feda8333ee4608534f51a0bcd3e2fe8b60ab900

git.diff

diff --git a/instrumentation/net/http/otelhttp/example/server/server.go b/instrumentation/net/http/otelhttp/example/server/server.go
index 7389c267..f128042b 100644
--- a/instrumentation/net/http/otelhttp/example/server/server.go
+++ b/instrumentation/net/http/otelhttp/example/server/server.go
@@ -19,6 +19,7 @@ import (
        "io"
        "log"
        "net/http"
+       "sync"

        "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"

@@ -53,7 +54,7 @@ func initTracer() *sdktrace.TracerProvider {
        return tp
 }

-func main() {
+func start() *sync.WaitGroup {
        tp := initTracer()
        defer func() {
                if err := tp.Shutdown(context.Background()); err != nil {
@@ -75,8 +76,21 @@ func main() {
        otelHandler := otelhttp.NewHandler(http.HandlerFunc(helloHandler), "Hello")

        http.Handle("/hello", otelHandler)
-       err := http.ListenAndServe(":7777", nil)
-       if err != nil {
-               panic(err)
-       }
+       wg := &sync.WaitGroup{}
+       wg.Add(1)
+
+       go func() {
+               defer wg.Done()
+               err := http.ListenAndServe(":7777", nil)
+               if err != nil {
+                       panic(err)
+               }
+       }()
+
+       return wg
+}
+
+func main() {
+       wg := start()
+       wg.Wait()
 }