whatcanGOwrong

go/pkg/mod/github.com/go-delve/delve@v1.23.0/_fixtures/issue573.go

@@ -0,0 +1,28 @@
+package main
+
+// A debugger test.
+//   dlv debug
+//   b main.foo
+//   c
+//   s
+//   s
+// Expect to be stopped in fmt.Printf or runtime.duffzero
+// In bug, s #2 runs to the process exit because the call
+// to duffzero enters duffzero well after the nominal entry
+// and skips the internal breakpoint placed by Step().
+import "fmt"
+
+var v int = 99
+
+func foo(x, y int) (z int) { // c stops here
+	fmt.Printf("x=%d, y=%d, z=%d\n", x, y, z) // s #1 stops here; s #2 is supposed to stop in Printf or duffzero.
+	z = x + y
+	return
+}
+
+func main() {
+	x := v
+	y := x * x
+	z := foo(x, y)
+	fmt.Printf("z=%d\n", z)
+}