gc: test that asserts closures are not wrapped when they don't have closure vars.

R=rsc, bradfitz
CC=golang-dev
https://golang.org/cl/5529060

diff --git a/test/closure.go b/test/closure.go
index 191514def49e2b862633fad07f68bb30aa247234..97da1dd23045d6d65393c40251e2fa0a73410782 100644 (file)
--- a/test/closure.go
+++ b/test/closure.go
@@ -6,6 +6,8 @@
 
 package main
 
+import "runtime"
+
 var c = make(chan int)
 
 func check(a []int) {
@@ -77,6 +79,8 @@ func h() {
 func newfunc() func(int) int { return func(x int) int { return x } }
 
 func main() {
+       var fail bool
+
        go f()
        check([]int{1, 4, 5, 4})
 
@@ -88,13 +92,26 @@ func main() {
        go h()
        check([]int{100, 200, 101, 201, 500, 101, 201, 500})
 
+       runtime.UpdateMemStats()
+        n0 := runtime.MemStats.Mallocs
+
        x, y := newfunc(), newfunc()
        if x(1) != 1 || y(2) != 2 {
                println("newfunc returned broken funcs")
-               panic("fail")
+               fail = true
+       }
+
+       runtime.UpdateMemStats()
+        if n0 != runtime.MemStats.Mallocs {
+               println("newfunc allocated unexpectedly")
+               fail = true
        }
 
        ff(1)
+
+       if fail {
+               panic("fail") 
+       }
 }
 
 func ff(x int) {