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-rw-r--r--test/fixedbugs/issue33275.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/fixedbugs/issue33275.go b/test/fixedbugs/issue33275.go
new file mode 100644
index 0000000..f2ec24d
--- /dev/null
+++ b/test/fixedbugs/issue33275.go
@@ -0,0 +1,34 @@
+// skip
+
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+ "fmt"
+ "time"
+)
+
+func main() {
+ // Make a big map.
+ m := map[int]int{}
+ for i := 0; i < 100000; i++ {
+ m[i] = i
+ }
+ c := make(chan string)
+ go func() {
+ // Print the map.
+ s := fmt.Sprintln(m)
+ c <- s
+ }()
+ go func() {
+ time.Sleep(1 * time.Millisecond)
+ // Add an extra item to the map while iterating.
+ m[-1] = -1
+ c <- ""
+ }()
+ <-c
+ <-c
+}