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-rw-r--r--shell/ash.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/shell/ash.c b/shell/ash.c
index bfa4a8c6d..29156c199 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -1216,6 +1216,9 @@ popstackmark(struct stackmark *mark)
{
struct stack_block *sp;
+ if (!mark->stackp)
+ return;
+
INT_OFF;
markp = mark->marknext;
while (stackp != mark->stackp) {