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-rw-r--r--src/client/view/selection.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/client/view/selection.js b/src/client/view/selection.js
index e85a750d..090b1a5f 100644
--- a/src/client/view/selection.js
+++ b/src/client/view/selection.js
@@ -44,7 +44,7 @@ function sortedArrayDiff(a, b, a_cmp_b)
b_i += 1;
a_i += 1;
}
- while (b_i < b.length && a_cmp_b(a[a_i], b[b_i]) == 1) {
+ while (b_i < b.length && a_i < a.length && a_cmp_b(a[a_i], b[b_i]) == 1) {
b_i += 1;
}
}