From 5f3ed3f7241df57cfbc98edabf84100ceea7bfb1 Mon Sep 17 00:00:00 2001
From: Joe Savona <joesavona@fb.com>
Date: Fri, 8 Mar 2024 13:59:21 -0800
Subject: [PATCH] Fixture for reassignment within value block

Fixture from T175283039, a reassignment within an expression can sometimes
generate a StoreLocal within a value block. Depending on the case this can end
up as the last instruction of the block, which then hits an invariant.
---
 ...reassign-in-while-loop-condition.expect.md | 38 +++++++++++++++++++
 ...r.todo-reassign-in-while-loop-condition.js | 17 +++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.expect.md
 create mode 100644 compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.js

diff --git a/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.expect.md b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.expect.md
new file mode 100644
index 0000000000..94a9cb8000
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.expect.md
@@ -0,0 +1,38 @@
+
+## Input
+
+```javascript
+import { makeArray } from "shared-runtime";
+
+// @flow
+function Component() {
+  const items = makeArray(0, 1, 2);
+  let item;
+  let sum = 0;
+  while ((item = items.pop())) {
+    sum += item;
+  }
+  return [sum];
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{}],
+};
+
+```
+
+
+## Error
+
+```
+   6 |   let item;
+   7 |   let sum = 0;
+>  8 |   while ((item = items.pop())) {
+     |           ^^^^ [ReactForget] Invariant: Unexpected StoreLocal in codegenInstructionValue (8:8)
+   9 |     sum += item;
+  10 |   }
+  11 |   return [sum];
+```
+          
+      
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.js b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.js
new file mode 100644
index 0000000000..1bd95da06a
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.todo-reassign-in-while-loop-condition.js
@@ -0,0 +1,17 @@
+import { makeArray } from "shared-runtime";
+
+// @flow
+function Component() {
+  const items = makeArray(0, 1, 2);
+  let item;
+  let sum = 0;
+  while ((item = items.pop())) {
+    sum += item;
+  }
+  return [sum];
+}
+
+export const FIXTURE_ENTRYPOINT = {
+  fn: Component,
+  params: [{}],
+};