From 1e2ed492e0feada0372ed6f510ac36ff42d241e4 Mon Sep 17 00:00:00 2001
From: simonm <unknown>
Date: Fri, 26 Feb 1999 12:32:51 +0000
Subject: [PATCH] [project @ 1999-02-26 12:32:51 by simonm] Fix run queue
corruption bug.
---
ghc/rts/Schedule.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/ghc/rts/Schedule.c b/ghc/rts/Schedule.c
index 0b273c403a21..0f5470659838 100644
--- a/ghc/rts/Schedule.c
+++ b/ghc/rts/Schedule.c
@@ -1,5 +1,5 @@
/* -----------------------------------------------------------------------------
- * $Id: Schedule.c,v 1.9 1999/02/05 16:02:53 simonm Exp $
+ * $Id: Schedule.c,v 1.10 1999/02/26 12:32:51 simonm Exp $
*
* (c) The GHC Team, 1998-1999
*
@@ -509,16 +509,17 @@ SchedulerStatus schedule(StgTSO *main, StgClosure **ret_val)
* t->link is already set to END_TSO_QUEUE.
*/
ASSERT(t->link == END_TSO_QUEUE);
- if (run_queue_tl != END_TSO_QUEUE) {
+ if (run_queue_tl == END_TSO_QUEUE) {
+ run_queue_hd = run_queue_tl = t;
+ } else {
ASSERT(get_itbl(run_queue_tl)->type == TSO);
if (run_queue_hd == run_queue_tl) {
run_queue_hd->link = t;
run_queue_tl = t;
} else {
run_queue_tl->link = t;
+ run_queue_tl = t;
}
- } else {
- run_queue_hd = run_queue_tl = t;
}
break;
--
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