Ticket #4828: haiku_ticket4828.diff

src/system/libroot/posix/pthread/pthread.c

@@ -191 +191 @@
 int
 pthread_detach(pthread_t thread)
 {
-    if (atomic_or(&thread->flags, THREAD_DETACHED) & THREAD_DEAD)
+    int32 flags;
+
+    if(thread == NULL)
+        return B_BAD_VALUE;
+
+    flags = atomic_or(&thread->flags, THREAD_DETACHED);
+    if (flags & THREAD_DETACHED)
+        return B_OK;
+
+    if (flags & THREAD_DEAD)
         free(thread);
 
-    return 0;
+    return B_OK;
 }