From ce4f47d2e99e85ff285129d530d1562e930ca8aa Mon Sep 17 00:00:00 2001
From: Folkert <folkert@folkertdev.nl>
Date: Sat, 19 Mar 2022 00:03:30 +0100
Subject: [PATCH] remove clones in IntroducedVariables clone

---
 compiler/can/src/annotation.rs | 11 +++++++++++
 compiler/can/src/expr.rs       |  3 ++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/compiler/can/src/annotation.rs b/compiler/can/src/annotation.rs
index 86eceda3ec..0525d6869e 100644
--- a/compiler/can/src/annotation.rs
+++ b/compiler/can/src/annotation.rs
@@ -80,6 +80,17 @@ impl IntroducedVariables {
         self.named.dedup_by(|nv1, nv2| nv1.name == nv2.name);
     }
 
+    pub fn union_owned(&mut self, other: Self) {
+        self.wildcards.extend(other.wildcards);
+        self.lambda_sets.extend(other.lambda_sets);
+        self.inferred.extend(other.inferred);
+        self.host_exposed_aliases.extend(other.host_exposed_aliases);
+
+        self.named.extend(other.named);
+        self.named.sort_by(|nv1, nv2| nv1.name.cmp(&nv2.name));
+        self.named.dedup_by(|nv1, nv2| nv1.name == nv2.name);
+    }
+
     pub fn var_by_name(&self, name: &Lowercase) -> Option<&Variable> {
         self.named
             .iter()
diff --git a/compiler/can/src/expr.rs b/compiler/can/src/expr.rs
index a1f9510b83..a579f5094d 100644
--- a/compiler/can/src/expr.rs
+++ b/compiler/can/src/expr.rs
@@ -40,7 +40,8 @@ impl Output {
             self.tail_call = Some(later);
         }
 
-        self.introduced_variables.union(&other.introduced_variables);
+        self.introduced_variables
+            .union_owned(other.introduced_variables);
         self.aliases.extend(other.aliases);
         self.non_closures.extend(other.non_closures);
     }