runtime/race: add test for issue 7561.
LGTM=dvyukov
R=rsc, iant, khr, dvyukov
CC=golang-codereviews
https://golang.org/cl/76520045
diff --git a/src/pkg/runtime/race/testdata/map_test.go b/src/pkg/runtime/race/testdata/map_test.go
index 9ba74b1..98e2a5f 100644
--- a/src/pkg/runtime/race/testdata/map_test.go
+++ b/src/pkg/runtime/race/testdata/map_test.go
@@ -198,6 +198,7 @@
delete(m, *k)
<-ch
}
+
func TestRaceMapInsertPartKey(t *testing.T) {
k := &Big{}
m := make(map[Big]bool)
@@ -209,6 +210,7 @@
m[*k] = true
<-ch
}
+
func TestRaceMapInsertPartVal(t *testing.T) {
v := &Big{}
m := make(map[int]Big)
@@ -220,3 +222,19 @@
m[1] = *v
<-ch
}
+
+// Test for issue 7561.
+func TestRaceMapAssignMultipleReturn(t *testing.T) {
+ connect := func() (int, error) { return 42, nil }
+ conns := make(map[int][]int)
+ conns[1] = []int{0}
+ ch := make(chan bool, 1)
+ var err error
+ go func() {
+ conns[1][0], err = connect()
+ ch <- true
+ }()
+ x := conns[1][0]
+ _ = x
+ <-ch
+}
