From fa50edc999c1ef2aa76e5c3a74fd5d8789fcb8bf Mon Sep 17 00:00:00 2001
From: Jacques Lucke <jacques@blender.org>
Date: Thu, 1 Apr 2021 12:25:30 +0200
Subject: BLI: return early when copying empty array

---
 source/blender/blenlib/BLI_linear_allocator.hh | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'source/blender/blenlib/BLI_linear_allocator.hh')

diff --git a/source/blender/blenlib/BLI_linear_allocator.hh b/source/blender/blenlib/BLI_linear_allocator.hh
index 47705b1d40b..6aa97d5c5e7 100644
--- a/source/blender/blenlib/BLI_linear_allocator.hh
+++ b/source/blender/blenlib/BLI_linear_allocator.hh
@@ -133,6 +133,9 @@ template<typename Allocator = GuardedAllocator> class LinearAllocator : NonCopya
    */
   template<typename T> MutableSpan<T> construct_array_copy(Span<T> src)
   {
+    if (src.is_empty()) {
+      return {};
+    }
     MutableSpan<T> dst = this->allocate_array<T>(src.size());
     uninitialized_copy_n(src.data(), src.size(), dst.data());
     return dst;
-- 
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