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-rw-r--r--test/fixedbugs/issue11286.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/fixedbugs/issue11286.go b/test/fixedbugs/issue11286.go
new file mode 100644
index 0000000..560b7d4
--- /dev/null
+++ b/test/fixedbugs/issue11286.go
@@ -0,0 +1,34 @@
+// run
+
+// Copyright 2015 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.
+
+// Test that pointer bitmaps of types with large scalar tails are
+// correctly repeated when unrolled into the heap bitmap.
+
+package main
+
+import "runtime"
+
+const D = 57
+
+type T struct {
+ a [D]float64
+ b map[string]int
+ c [D]float64
+}
+
+var ts []T
+
+func main() {
+ ts = make([]T, 4)
+ for i := range ts {
+ ts[i].b = make(map[string]int)
+ }
+ ts[3].b["abc"] = 42
+ runtime.GC()
+ if ts[3].b["abc"] != 42 {
+ panic("bad field value")
+ }
+}