Working on 2 argument spawn. The arguments seem to be copied correctly once, but then they get lost.

src/comp/middle/trans.rs

@@ -5882,9 +5882,7 @@ fn trans_spawn(&@block_ctxt cx,
                                      e));
     }
 
-    // Make the tuple. We have to reverse the types first though.
-    //vec::reverse[ty::t](arg_tys);
-    //vec::reverse[ValueRef](arg_vals);
+    // Make the tuple.
     auto args_ty = ty::mk_imm_tup(cx.fcx.lcx.ccx.tcx, arg_tys);
     
     // Allocate and fill the tuple.

src/rt/rust_task.cpp

@@ -171,7 +171,12 @@ rust_task::start(uintptr_t spawnee_fn,
     src += 1;                  // spawn-call task slot
     src += 1;                  // spawn-call closure-or-obj slot
 
-    *spp-- = (uintptr_t) *src;       // vec
+    spp -= (args_size / sizeof(uintptr_t)) - 1;
+    memmove(spp, src, args_size);
+    spp--;
+
+    //*spp-- = (uintptr_t) *src;       // vec
+    
     *spp-- = (uintptr_t) 0x0;        // closure-or-obj
     *spp-- = (uintptr_t) this;       // task
     *spp-- = (uintptr_t) dummy_ret;  // output address
@@ -179,7 +184,6 @@ rust_task::start(uintptr_t spawnee_fn,
     I(dom, spp == align_down(spp));
     *spp-- = (uintptr_t) (uintptr_t) spawnee_fn;
 
-
     *spp-- = (uintptr_t) 0x0;        // retp
 
     *spp-- = (uintptr_t) rust_new_exit_task_glue;

src/test/run-pass/spawn2.rs

@@ -0,0 +1,15 @@
+// xfail-stage0
+// xfail-stage1
+// xfail-stage2
+// -*- rust -*-
+
+use std;
+
+fn main() {
+  spawn child(10, 20);
+}
+
+fn child(int i, int j) {
+  log_err i;
+  log_err j;
+}