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-rw-r--r--test/fixedbugs/issue40917.go23
1 files changed, 23 insertions, 0 deletions
diff --git a/test/fixedbugs/issue40917.go b/test/fixedbugs/issue40917.go
new file mode 100644
index 0000000..2128be5
--- /dev/null
+++ b/test/fixedbugs/issue40917.go
@@ -0,0 +1,23 @@
+// run -gcflags=-d=checkptr
+
+// Copyright 2020 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 "unsafe"
+
+func main() {
+ var x [2]uint64
+ a := unsafe.Pointer(&x[1])
+
+ b := a
+ b = unsafe.Pointer(uintptr(b) + 2)
+ b = unsafe.Pointer(uintptr(b) - 1)
+ b = unsafe.Pointer(uintptr(b) &^ 1)
+
+ if a != b {
+ panic("pointer arithmetic failed")
+ }
+}