X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2FThreads.c;h=dcb916a92bd4173f326507eed85292eb003fad5f;hb=b36b42fdc0554447ead96305dc2979ffcd74aff9;hp=e86630e77eb49f4cd8ea369c14fef1d01739cb83;hpb=4f37664780b85725ba3552b7de11c0e5e79d3fee;p=ghc-hetmet.git

diff --git a/rts/Threads.c b/rts/Threads.c
index e86630e..dcb916a 100644
--- a/rts/Threads.c
+++ b/rts/Threads.c
@@ -667,7 +667,7 @@ threadStackUnderflow (Capability *cap, StgTSO *tso)
     if (retvals != 0)
     {
         // we have some return values to copy to the old stack
-        if ((new_stack->sp - new_stack->stack) < retvals)
+        if ((nat)(new_stack->sp - new_stack->stack) < retvals)
         {
             barf("threadStackUnderflow: not enough space for return values");
         }