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-rw-r--r--composite/compalloc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/composite/compalloc.c b/composite/compalloc.c
index 0372b9bfa..19c7db0b3 100644
--- a/composite/compalloc.c
+++ b/composite/compalloc.c
@@ -82,6 +82,9 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
return Success;
}
+ if (!pWin->parent)
+ return BadMatch;
+
/*
* Only one Manual update is allowed
*/