Examples Segfault on OS X (LLVM 3.8.1) about llvm-rs HOT 3 CLOSED

diff --git a/examples/add.rs b/examples/add.rs
index 9050176..f1f8cf0 100644
--- a/examples/add.rs
+++ b/examples/add.rs
@@ -1,21 +1,25 @@
 extern crate llvm;
+use std::mem;
 use llvm::*;
 use llvm::Attribute::*;
 fn main() {
     let ctx = Context::new();
     let module = Module::new("add", &ctx);
-    let func = module.add_function("add", Type::get::<fn(f64, f64) -> f64>(&ctx));
-    func.add_attributes(&[NoUnwind, ReadNone]);
-    let entry = func.append("entry");
-    let builder = Builder::new(&ctx);
-    builder.position_at_end(entry);
-    let a = &func[0];
-    let b = &func[1];
-    let value = builder.build_add(a, b);
-    builder.build_ret(value);
-    module.verify().unwrap();
-    let ee = JitEngine::new(&module, JitOptions {opt_level: 3}).unwrap();
-    ee.with_function(func, |add:extern fn((f64, f64)) -> f64| {
-        println!("{} + {} = {}", 1., 2., add((1., 2.)));
-    });
+    {
+        let func = module.add_function("add", Type::get::<fn(f64, f64) -> f64>(&ctx));
+        func.add_attributes(&[NoUnwind, ReadNone]);
+        let entry = func.append("entry");
+        let builder = Builder::new(&ctx);
+        builder.position_at_end(entry);
+        let a = &func[0];
+        let b = &func[1];
+        let value = builder.build_add(a, b);
+        builder.build_ret(value);
+        module.verify().unwrap();
+        let ee = JitEngine::new(&module, JitOptions {opt_level: 3}).unwrap();
+        ee.with_function(func, |add:extern fn((f64, f64)) -> f64| {
+            println!("{} + {} = {}", 1., 2., add((1., 2.)));
+        });
+    }
+    mem::forget(module);
 }