1 files changed, 25 insertions, 0 deletions
diff --git a/test/fixedbugs/issue15039.go b/test/fixedbugs/issue15039.go
new file mode 100644
index 0000000..85d9e83
--- /dev/null
+++ b/test/fixedbugs/issue15039.go
@@ -0,0 +1,25 @@
+// run
+
+// Copyright 2016 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
+
+func main() {
+	const fffd = "\uFFFD"
+
+	// runtime.intstring used to convert int64 to rune without checking
+	// for truncation.
+	u := uint64(0x10001f4a9)
+	big := string(u)
+	if big != fffd {
+		panic("big != bad")
+	}
+
+	// cmd/compile used to require integer constants to fit into an "int".
+	const huge = string(1<<100)
+	if huge != fffd {
+		panic("huge != bad")
+	}
+}