From 06ffc7e9522d749afb9489c9739538e562799a93 Mon Sep 17 00:00:00 2001
From: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>
Date: Tue, 19 Sep 2023 15:20:02 +0200
Subject: [PATCH] Fix allocation size overflow check in `CowData`

---
 include/godot_cpp/templates/cowdata.hpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/godot_cpp/templates/cowdata.hpp b/include/godot_cpp/templates/cowdata.hpp
index d3ea982..b5c6e0b 100644
--- a/include/godot_cpp/templates/cowdata.hpp
+++ b/include/godot_cpp/templates/cowdata.hpp
@@ -102,6 +102,10 @@ private:
 	}
 
 	_FORCE_INLINE_ bool _get_alloc_size_checked(size_t p_elements, size_t *out) const {
+		if (unlikely(p_elements == 0)) {
+			*out = 0;
+			return true;
+		}
 #if defined(__GNUC__)
 		size_t o;
 		size_t p;
@@ -113,13 +117,12 @@ private:
 		if (__builtin_add_overflow(o, static_cast<size_t>(32), &p)) {
 			return false; // No longer allocated here.
 		}
-		return true;
 #else
 		// Speed is more important than correctness here, do the operations unchecked
 		// and hope for the best.
 		*out = _get_alloc_size(p_elements);
-		return true;
 #endif
+		return *out;
 	}
 
 	void _unref(void *p_data);