fix(linter): handle loops in getter-return rule (#5517)

- Fixes https://github.com/oxc-project/oxc/issues/3935

Prior to this, it didn't seem like we were correctly continuing to
search the graph after we encountered a backedge (loop). Now, when
encountering a cycle, we will not automatically break or prune the
search.

crates/oxc_linter/src/rules/eslint/getter_return.rs

@@ -257,6 +257,7 @@ impl GetterReturn {
                                 e.weight(),
                                 EdgeType::Jump
                                     | EdgeType::Normal
+                                    | EdgeType::Backedge
                                     | EdgeType::Error(ErrorEdgeKind::Explicit)
                             )
                         }) {
@@ -351,6 +352,45 @@ fn test() {
             }
         };
         ", None),
+        // adapted from: https://github.com/1024pix/pix/blob/1352bd8d7f6070f1ff8da79867f543c1c1926e59/mon-pix/app/components/progress-bar.js#L29-L43
+        ("
+        export default class ProgressBar extends Component {
+            get steps() {
+                const steps = [];
+
+                for (let i = 0; i < this.maxStepsNumber; i++) {
+                    steps.push({
+                        stepnum: i + 1,
+                    });
+                }
+
+                return steps;
+            }
+        }", None),
+        ("
+        var foo = {
+            get bar() {
+                for (let i = 0; i<10; i++) {
+                    if (i === 5) {
+                        return i;
+                    }
+                }
+                return 0;
+            }
+        }", None),
+        ("
+        var foo = {
+            get bar() {
+                let i = 0;
+                while (i < 10) {
+                    if (i === 5) {
+                        return i;
+                    }
+                    i++;
+                }
+                return 0;
+            }
+        }", None),
     ];
 
     let fail = vec![
@@ -426,6 +466,23 @@ fn test() {
         ),
         ("var foo = { get bar() { try { return a(); } catch {} } };", None),
         ("var foo = { get bar() { try { return a(); } catch {  } finally {  } } };", None),
+        ("
+        var foo = {
+            get bar() {
+                for (let i = 0; i<10; i++) {
+                    return i;
+                }
+            }
+        }", None),
+        ("
+        var foo = {
+            get bar() {
+                let i = 0;
+                while (i < 10) {
+                    return i;
+                }
+            }
+        }", None),
     ];
 
     Tester::new(GetterReturn::NAME, pass, fail)

crates/oxc_linter/src/snapshots/getter_return.snap

@@ -254,3 +254,28 @@ source: crates/oxc_linter/src/tester.rs
    ·                    ──────────────────────────────────────────────────
    ╰────
   help: Return a value from all code paths in getter.
+
+  ⚠ eslint(getter-return): Expected to always return a value in getter.
+   ╭─[getter_return.js:3:20]
+ 2 │             var foo = {
+ 3 │ ╭─▶             get bar() {
+ 4 │ │                   for (let i = 0; i<10; i++) {
+ 5 │ │                       return i;
+ 6 │ │                   }
+ 7 │ ╰─▶             }
+ 8 │             }
+   ╰────
+  help: Return a value from all code paths in getter.
+
+  ⚠ eslint(getter-return): Expected to always return a value in getter.
+   ╭─[getter_return.js:3:20]
+ 2 │             var foo = {
+ 3 │ ╭─▶             get bar() {
+ 4 │ │                   let i = 0;
+ 5 │ │                   while (i < 10) {
+ 6 │ │                       return i;
+ 7 │ │                   }
+ 8 │ ╰─▶             }
+ 9 │             }
+   ╰────
+  help: Return a value from all code paths in getter.