[compiler] Repro for outlining bug in funcexprs

I discovered this compiler crash while trying to do an internal sync of
the compiler. Any kind of outlining appears to crash the babel plugin
when the component is a function expression.

ghstack-source-id: 4f717674af91d4d4b730e64cbd7a144b9faab13e
Pull Request resolved: #30443

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.bug-outlining-in-func-expr.expect.md

@@ -0,0 +1,24 @@
+
+## Input
+
+```javascript
+const Component2 = props => {
+  return (
+    <ul>
+      {props.items.map(item => (
+        <li key={item.id}>{item.name}</li>
+      ))}
+    </ul>
+  );
+};
+
+```
+
+
+## Error
+
+```
+Invalid value used in weak set
+```
+          
+      

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.bug-outlining-in-func-expr.js

@@ -0,0 +1,9 @@
+const Component2 = props => {
+  return (
+    <ul>
+      {props.items.map(item => (
+        <li key={item.id}>{item.name}</li>
+      ))}
+    </ul>
+  );
+};