fix dev-wasm ListGetUnsafe refcounting

crates/compiler/gen_wasm/src/low_level.rs

@@ -416,13 +416,6 @@ impl<'a> LowLevelCall<'a> {
                     AddressValue::NotLoaded(elem_local),
                     0,
                 );
-
-                // Increment refcount
-                if self.ret_layout_raw.is_refcounted(backend.layout_interner) {
-                    let inc_fn = backend.get_refcount_fn_index(self.ret_layout, HelperOp::Inc);
-                    backend.code_builder.get_local(elem_local);
-                    backend.code_builder.call(inc_fn);
-                }
             }
             ListReplaceUnsafe => {
                 // List.replace_unsafe : List elem, U64, elem -> { list: List elem, value: elem }

crates/compiler/test_gen/src/gen_refcount.rs

@@ -179,6 +179,26 @@ fn list_str_slice() {
     );
 }
 
+#[test]
+#[cfg(feature = "gen-wasm")]
+fn list_get() {
+    assert_refcounts!(
+        indoc!(
+            r#"
+                s = Str.concat "A long enough string " "to be heap-allocated"
+                i1 = [s, s, s]
+                List.get i1 1
+                |> Result.withDefault ""
+            "#
+        ),
+        RocStr,
+        &[
+            (StandardRC, Live(1)),    // s
+            (AfterSize, Deallocated), // i1
+        ]
+    );
+}
+
 #[test]
 #[cfg(feature = "gen-wasm")]
 fn list_map() {