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-rw-r--r--test/fixedbugs/issue20530.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/fixedbugs/issue20530.go b/test/fixedbugs/issue20530.go
new file mode 100644
index 0000000..51f0bd8
--- /dev/null
+++ b/test/fixedbugs/issue20530.go
@@ -0,0 +1,34 @@
+// run
+
+// Copyright 2017 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
+
+var a uint8
+
+//go:noinline
+func f() {
+ b := int8(func() int32 { return -1 }())
+ a = uint8(b)
+ if int32(a) != 255 {
+ // Failing case prints 'got 255 expected 255'
+ println("got", a, "expected 255")
+ }
+}
+
+//go:noinline
+func g() {
+ b := int8(func() uint32 { return 0xffffffff }())
+ a = uint8(b)
+ if int32(a) != 255 {
+ // Failing case prints 'got 255 expected 255'
+ println("got", a, "expected 255")
+ }
+}
+
+func main() {
+ f()
+ g()
+}