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-rw-r--r--util/interval-tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/interval-tree.c b/util/interval-tree.c
index f2866aa..5346518 100644
--- a/util/interval-tree.c
+++ b/util/interval-tree.c
@@ -797,7 +797,7 @@ IntervalTreeNode *interval_tree_iter_first(IntervalTreeRoot *root,
{
IntervalTreeNode *node, *leftmost;
- if (!root->rb_root.rb_node) {
+ if (!root || !root->rb_root.rb_node) {
return NULL;
}