test: add test cases for index value with range array clear

Updates #61127

Change-Id: I5fb032c990b64bb4f455a7c0345cfb556bf263bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/508335
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>

diff --git a/test/for.go b/test/for.go
index 8a50090657fb51d36f78f499b2f49700b680d760..cfb7f6dad24d5bdd80dca111be9a9ae6806ef1af 100644 (file)
--- a/test/for.go
+++ b/test/for.go
@@ -44,15 +44,33 @@ func main() {
        for sum < 100 {
                sum = sum + 9
        }
-       assertequal(sum, 99 + 9, "only one")
+       assertequal(sum, 99+9, "only one")
 
        sum = 0
        for i := 0; i <= 10; i++ {
-               if i % 2 == 0 {
+               if i%2 == 0 {
                        continue
                }
                sum = sum + i
        }
        assertequal(sum, 1+3+5+7+9, "continue")
 
+       i = 0
+       for i = range [5]struct{}{} {
+       }
+       assertequal(i, 4, " incorrect index value after range loop")
+
+       i = 0
+       var a1 [5]struct{}
+       for i = range a1 {
+               a1[i] = struct{}{}
+       }
+       assertequal(i, 4, " incorrect index value after array with zero size elem range clear")
+
+       i = 0
+       var a2 [5]int
+       for i = range a2 {
+               a2[i] = 0
+       }
+       assertequal(i, 4, " incorrect index value after array range clear")
 }