1 files changed, 35 insertions, 0 deletions
diff --git a/misc/cgo/test/issue12030.go b/misc/cgo/test/issue12030.go
new file mode 100644
index 0000000000..ef8f86f53e
--- /dev/null
+++ b/misc/cgo/test/issue12030.go
@@ -0,0 +1,35 @@
+// 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.
+
+// Issue 12030. sprintf is defined in both ntdll and msvcrt,
+// Normally we want the one in the msvcrt.
+
+package cgotest
+
+/*
+#include <stdio.h>
+#include <stdlib.h>
+void issue12030conv(char *buf, double x) {
+	sprintf(buf, "d=%g", x);
+}
+*/
+import "C"
+
+import (
+	"fmt"
+	"testing"
+	"unsafe"
+)
+
+func test12030(t *testing.T) {
+	buf := (*C.char)(C.malloc(256))
+	defer C.free(unsafe.Pointer(buf))
+	for _, f := range []float64{1.0, 2.0, 3.14} {
+		C.issue12030conv(buf, C.double(f))
+		got := C.GoString(buf)
+		if want := fmt.Sprintf("d=%g", f); got != want {
+			t.Fatalf("C.sprintf failed for %g: %q != %q", f, got, want)
+		}
+	}
+}