From 2c0b29efd13aaacab98a9024ae8eefb8b89a528f Mon Sep 17 00:00:00 2001
From: Folkert <folkert@folkertdev.nl>
Date: Sun, 17 Apr 2022 20:43:45 +0200
Subject: [PATCH] use VecSet in IntroducedVariables

---
 compiler/collections/src/all.rs    | 10 +++++-----
 compiler/load_internal/src/file.rs |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/compiler/collections/src/all.rs b/compiler/collections/src/all.rs
index f773f0e48a..6c1a2b78c4 100644
--- a/compiler/collections/src/all.rs
+++ b/compiler/collections/src/all.rs
@@ -285,19 +285,19 @@ impl<T: PartialEq> VecSet<T> {
 
 impl<A: Ord> Extend<A> for VecSet<A> {
     fn extend<T: IntoIterator<Item = A>>(&mut self, iter: T) {
-        let mut it = iter.into_iter();
+        let it = iter.into_iter();
         let hint = it.size_hint();
 
         match hint {
             (0, Some(0)) => {
                 // done, do nothing
             }
-            (1, Some(1)) => {
-                let value = it.next().unwrap();
-                self.insert(value);
+            (1, Some(1)) | (2, Some(2)) => {
+                for value in it {
+                    self.insert(value);
+                }
             }
             _ => {
-                println!("extend {:?}", hint);
                 self.elements.extend(it);
 
                 self.elements.sort();
diff --git a/compiler/load_internal/src/file.rs b/compiler/load_internal/src/file.rs
index 902fba613c..3eabe6bb65 100644
--- a/compiler/load_internal/src/file.rs
+++ b/compiler/load_internal/src/file.rs
@@ -41,7 +41,7 @@ use roc_types::solved_types::Solved;
 use roc_types::subs::{Subs, VarStore, Variable};
 use roc_types::types::{Alias, AliasCommon, TypeExtension};
 use std::collections::hash_map::Entry::{Occupied, Vacant};
-use std::collections::{HashMap, };
+use std::collections::HashMap;
 use std::io;
 use std::iter;
 use std::ops::ControlFlow;