compiler, runtime: make slice lookup panics recoverable

testdata/recover.go

@@ -32,6 +32,7 @@ func main() {
 
 	println("\n# runtime panics")
 	runtimePanicDivByZero(1, 0)
+	runtimePanicLookup([]int{1, 2, 3}, 10)
 
 	println("\n# runtime.Goexit")
 	runtimeGoexit()
@@ -127,6 +128,16 @@ func runtimePanicDivByZero(a, b int) int {
 	return a / b
 }
 
+func runtimePanicLookup(slice []int, index int) int {
+	defer func() {
+		if err := recover(); err != nil {
+			println("recovered:", err)
+		}
+	}()
+
+	return slice[index]
+}
+
 func runtimeGoexit() {
 	wg.Add(1)
 	go func() {