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-rw-r--r--src/gleam/iterator.gleam2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gleam/iterator.gleam b/src/gleam/iterator.gleam
index dadf78f..e4d572a 100644
--- a/src/gleam/iterator.gleam
+++ b/src/gleam/iterator.gleam
@@ -1245,7 +1245,7 @@ fn group_updater(
) -> fn(Dict(key, List(element)), element) -> Dict(key, List(element)) {
fn(groups, elem) {
groups
- |> dict.update(f(elem), update_group_with(elem))
+ |> dict.upsert(f(elem), update_group_with(elem))
}
}