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-rw-r--r--rts/Threads.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/rts/Threads.c b/rts/Threads.c
index 2bdcea1c00..3d5b463051 100644
--- a/rts/Threads.c
+++ b/rts/Threads.c
@@ -85,7 +85,7 @@ createThread(Capability *cap, W_ size)
SET_HDR(stack, &stg_STACK_info, cap->r.rCCCS);
stack->stack_size = stack_size - sizeofW(StgStack);
stack->sp = stack->stack + stack->stack_size;
- stack->dirty = 1;
+ stack->dirty = STACK_DIRTY;
tso = (StgTSO *)allocate(cap, sizeofW(StgTSO));
TICK_ALLOC_TSO();
@@ -804,7 +804,7 @@ loop:
// indicate that the MVar operation has now completed.
tso->_link = (StgTSO*)&stg_END_TSO_QUEUE_closure;
- if (stack->dirty == 0) {
+ if ((stack->dirty & STACK_DIRTY) == 0) {
dirty_STACK(cap, stack);
}