From b1d31f129672713422f9c7c719f64389917dd30e Mon Sep 17 00:00:00 2001
From: N R Navaneet <156576749+nrnavaneet@users.noreply.github.com>
Date: Thu, 3 Jul 2025 10:44:51 +0530
Subject: [PATCH] Backport PR #30243: Fix FancyArrow rendering for zero-length
 arrows

---
 lib/matplotlib/patches.py            | 2 +-
 lib/matplotlib/tests/test_patches.py | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
index 736b1e77e1ac..96b9c4f11066 100644
--- a/lib/matplotlib/patches.py
+++ b/lib/matplotlib/patches.py
@@ -1515,7 +1515,7 @@ def _make_verts(self):
             length = distance
         else:
             length = distance + head_length
-        if not length:
+        if np.size(length) == 0:
             self.verts = np.empty([0, 2])  # display nothing if empty
         else:
             # start by drawing horizontal arrow, point at (0, 0)
diff --git a/lib/matplotlib/tests/test_patches.py b/lib/matplotlib/tests/test_patches.py
index d98998ef179a..98e45dbad9e0 100644
--- a/lib/matplotlib/tests/test_patches.py
+++ b/lib/matplotlib/tests/test_patches.py
@@ -999,3 +999,9 @@ def test_set_and_get_hatch_linewidth(fig_test, fig_ref):
 
     assert ax_ref.patches[0].get_hatch_linewidth() == lw
     assert ax_test.patches[0].get_hatch_linewidth() == lw
+
+
+def test_empty_fancyarrow():
+    fig, ax = plt.subplots()
+    arrow = ax.arrow([], [], [], [])
+    assert arrow is not None