X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FWeak.c;h=bc993ecf3b6b8889d2510d03d9b59368479362af;hb=ce6e38dc12b5feae2eb43e94d833646a9c921cda;hp=117d6a005c9288fb35987e82117f49987307d643;hpb=d3058014b75ef30cc1535dcc6abcf073b3170697;p=ghc-hetmet.git

diff --git a/ghc/rts/Weak.c b/ghc/rts/Weak.c
index 117d6a0..bc993ec 100644
--- a/ghc/rts/Weak.c
+++ b/ghc/rts/Weak.c
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: Weak.c,v 1.14 2000/05/22 13:09:29 simonmar Exp $
+ * $Id: Weak.c,v 1.15 2000/06/20 15:18:40 simonmar Exp $
  *
  * (c) The GHC Team, 1998-1999
  *
@@ -34,10 +34,12 @@ finalizeWeakPointersNow(void)
   
   while ((w = weak_ptr_list)) {
     weak_ptr_list = w->link;
-    IF_DEBUG(weak,fprintf(stderr,"Finalising weak pointer at %p -> %p\n", w, w->key));
-    w->header.info = &DEAD_WEAK_info;
-    if (w->finalizer != &NO_FINALIZER_closure) {
-      rts_evalIO(w->finalizer,NULL);
+    if (w->header.info != &DEAD_WEAK_info) {
+	w->header.info = &DEAD_WEAK_info;
+	IF_DEBUG(weak,fprintf(stderr,"Finalising weak pointer at %p -> %p\n", w, w->key));
+	if (w->finalizer != &NO_FINALIZER_closure) {
+	    rts_evalIO(w->finalizer,NULL);
+	}
     }
   }
 }