1 files changed, 41 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-2214.rs b/tests/ui/issues/issue-2214.rs
new file mode 100644
index 000000000..1994c3515
--- /dev/null
+++ b/tests/ui/issues/issue-2214.rs
@@ -0,0 +1,41 @@
+// run-pass
+// ignore-wasm32-bare no libc to test ffi with
+// ignore-sgx no libc
+#![feature(rustc_private)]
+
+extern crate libc;
+
+use libc::{c_double, c_int};
+use std::mem;
+
+fn to_c_int(v: &mut isize) -> &mut c_int {
+    unsafe { mem::transmute_copy(&v) }
+}
+
+fn lgamma(n: c_double, value: &mut isize) -> c_double {
+    unsafe {
+        return m::lgamma(n, to_c_int(value));
+    }
+}
+
+mod m {
+    use libc::{c_double, c_int};
+
+    extern "C" {
+        #[cfg(all(unix, not(target_os = "vxworks")))]
+        #[link_name="lgamma_r"]
+        pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
+        #[cfg(windows)]
+        #[link_name = "lgamma"]
+        pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
+        #[cfg(target_os = "vxworks")]
+        #[link_name = "lgamma"]
+        pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
+    }
+}
+
+pub fn main() {
+    let mut y: isize = 5;
+    let x: &mut isize = &mut y;
+    assert_eq!(lgamma(1.0 as c_double, x), 0.0 as c_double);
+}