---

yaml
---
r: 1022
b: refs/heads/master
c: e558ff9
h: refs/heads/master
v: v3

Author: pcwalton

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7f85945b054ff5b991ae1be021882ba15f56d416
+refs/heads/master: e558ff907f1df4a2b67a58d37cbc11c0172d1eb6

trunk/src/comp/middle/trans.rs

@@ -1885,12 +1885,15 @@ fn copy_args_to_allocas(@block_ctxt cx, vec[ast.arg] args,
     let uint arg_n = 0u;
 
     for (ast.arg aarg in args) {
-        auto arg_t = type_of_arg(cx.fcx.ccx, arg_tys.(arg_n));
-        auto alloca = cx.build.Alloca(arg_t);
-        auto argval = cx.fcx.llargs.get(aarg.id);
-        cx.build.Store(argval, alloca);
-        // Overwrite the llargs entry for this arg with its alloca.
-        cx.fcx.llargs.insert(aarg.id, alloca);
+        if (aarg.mode != ast.alias) {
+            auto arg_t = type_of_arg(cx.fcx.ccx, arg_tys.(arg_n));
+            auto alloca = cx.build.Alloca(arg_t);
+            auto argval = cx.fcx.llargs.get(aarg.id);
+            cx.build.Store(argval, alloca);
+            // Overwrite the llargs entry for this arg with its alloca.
+            cx.fcx.llargs.insert(aarg.id, alloca);
+        }
+
         arg_n += 1u;
     }
 }