[patch] Repro and fix for duplicate import statements

compiler/packages/babel-plugin-react-forget/src/Entrypoint/Imports.ts

@@ -109,7 +109,12 @@ export function updateExistingReactImportDeclaration(
   let didInsertUseMemoCache = false;
   program.traverse({
     ImportDeclaration(importDeclPath) {
-      if (isNonNamespacedImportOfReact(importDeclPath)) {
+      if (
+        !didInsertUseMemoCache &&
+        importDeclPath.node.importKind !== "type" &&
+        importDeclPath.node.importKind !== "typeof" &&
+        isNonNamespacedImportOfReact(importDeclPath)
+      ) {
         importDeclPath.pushContainer(
           "specifiers",
           t.importSpecifier(

compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/repro-duplicate-import-specifier.expect.md

@@ -0,0 +1,47 @@
+
+## Input
+
+```javascript
+import type { SetStateAction, Dispatch } from "react";
+import { useState } from "react";
+
+function Component(_props: {}) {
+  const [x, _setX]: [number, Dispatch<SetStateAction<number>>] = useState(0);
+  return { x };
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{}],
+};
+
+```
+
+## Code
+
+```javascript
+import type { SetStateAction, Dispatch } from "react";
+import { useState, unstable_useMemoCache as useMemoCache } from "react";
+
+function Component(_props) {
+  const $ = useMemoCache(2);
+  const [x] = useState(0);
+  const c_0 = $[0] !== x;
+  let t0;
+  if (c_0) {
+    t0 = { x };
+    $[0] = x;
+    $[1] = t0;
+  } else {
+    t0 = $[1];
+  }
+  return t0;
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{}],
+};
+
+```
+      

compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/repro-duplicate-import-specifier.ts

@@ -0,0 +1,12 @@
+import type { SetStateAction, Dispatch } from "react";
+import { useState } from "react";
+
+function Component(_props: {}) {
+  const [x, _setX]: [number, Dispatch<SetStateAction<number>>] = useState(0);
+  return { x };
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{}],
+};