From dfd27ab406c2a7b848c3e410c0d59068ff73c750 Mon Sep 17 00:00:00 2001
From: Tyler Dunn <contact@tsunami.dev>
Date: Tue, 28 May 2024 21:13:10 -0400
Subject: [PATCH] dart: Fix incorrect write in Float64 write method (#8290)

Co-authored-by: Llamadmiral <Llamadmiral@users.noreply.github.com>
Co-authored-by: Derek Bailey <derekbailey@google.com>
---
 dart/lib/flat_buffers.dart       | 2 +-
 dart/test/flat_buffers_test.dart | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/dart/lib/flat_buffers.dart b/dart/lib/flat_buffers.dart
index 6f307872e10..2395992ae28 100644
--- a/dart/lib/flat_buffers.dart
+++ b/dart/lib/flat_buffers.dart
@@ -386,7 +386,7 @@ class Builder {
   /// Updates the [offset] pointer.  This method is intended for use when writing structs to the buffer.
   void putFloat64(double value) {
     _prepare(_sizeofFloat64, 1);
-    _setFloat32AtTail(_tail, value);
+    _setFloat64AtTail(_tail, value);
   }
 
   /// Writes a Float32 to the tail of the buffer after preparing space for it.
diff --git a/dart/test/flat_buffers_test.dart b/dart/test/flat_buffers_test.dart
index caf2fc79a9e..83a6e2b3f1e 100644
--- a/dart/test/flat_buffers_test.dart
+++ b/dart/test/flat_buffers_test.dart
@@ -215,6 +215,10 @@ class BuilderTest {
       ..addTestarrayofstringOffset(testArrayOfString);
     final mon = monBuilder.finish();
     fbBuilder.finish(mon);
+
+    final mon3 = example.Monster(fbBuilder.buffer);
+    expect(mon3.name, 'MyMonster');
+    expect(mon3.pos!.test1, 3.0);
   }
 
   void test_error_addInt32_withoutStartTable([Builder? builder]) {