whatcanGOwrong

go/pkg/mod/github.com/go-delve/delve@v1.23.0/_fixtures/databpeasy.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"sync"
+	"time"
+)
+
+var globalvar1 = 0
+var globalvar2 = 0
+
+func main() { // Position 0
+	runtime.LockOSThread()
+	globalvar2 = 1
+	fmt.Printf("%d %d\n", globalvar1, globalvar2)
+	globalvar2 = globalvar1 + 1
+	globalvar1 = globalvar2 + 1
+	fmt.Printf("%d %d\n", globalvar1, globalvar2) // Position 1
+
+	globalvar2 = globalvar2 + 1          // Position 2
+	globalvar2 = globalvar1 + globalvar2 // Position 3
+	fmt.Printf("%d %d\n", globalvar1, globalvar2)
+	globalvar1 = globalvar2 + 1
+	fmt.Printf("%d %d\n", globalvar1, globalvar2)
+
+	done := make(chan struct{}) // Position 4
+	var wg sync.WaitGroup
+	for i := 0; i < 20; i++ {
+		wg.Add(1)
+		go waitfunc(i, &wg)
+	}
+	wg.Wait()
+	go f(done)
+	<-done
+}
+
+func f(done chan struct{}) {
+	runtime.LockOSThread()
+	globalvar1 = globalvar2 + 2
+	close(done) // Position 5
+}
+
+func waitfunc(i int, wg *sync.WaitGroup) {
+	runtime.LockOSThread()
+	wg.Done()
+	time.Sleep(50 * time.Second)
+}