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-rw-r--r--src/intervals.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/intervals.c b/src/intervals.c
index 75e37a8c90c..ee976fb1035 100644
--- a/src/intervals.c
+++ b/src/intervals.c
@@ -2333,6 +2333,9 @@ set_intervals_multibyte_1 (INTERVAL i, bool multi_flag,
if (TOTAL_LENGTH (i) == 0)
{
+ /* Delete the whole subtree. */
+ i->left = NULL;
+ i->right = NULL;
delete_interval (i);
return;
}