From: Simon Marlow <marlowsd@gmail.com>
Date: Thu, 11 Mar 2010 09:36:32 +0000 (+0000)
Subject: fix bug in discardTasksExcept() that broke forkProcess
X-Git-Tag: 2010-03-16~10
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=12cfec943127f0c81e1ffa1ca5ce46e888e3027c

fix bug in discardTasksExcept() that broke forkProcess
---

diff --git a/rts/Task.c b/rts/Task.c
index 2921e9e..e2f363b 100644
--- a/rts/Task.c
+++ b/rts/Task.c
@@ -280,11 +280,12 @@ boundTaskExiting (Task *task)
 void
 discardTasksExcept (Task *keep)
 {
-    Task *task;
+    Task *task, *next;
 
     // Wipe the task list, except the current Task.
     ACQUIRE_LOCK(&sched_mutex);
-    for (task = all_tasks; task != NULL; task=task->all_link) {
+    for (task = all_tasks; task != NULL; task=next) {
+        next = task->all_link;
         if (task != keep) {
             debugTrace(DEBUG_sched, "discarding task %ld", (long)TASK_ID(task));
             freeTask(task);