From f2c0ef3e00d42e5329f4154e42e175c077bac23d Mon Sep 17 00:00:00 2001
From: Elliott Sales de Andrade <quantum.analyst@gmail.com>
Date: Wed, 26 Aug 2026 20:59:51 -0400
Subject: [PATCH] Disable pickling for LineAccumulator

There's not really any useful API here for Python, and we should
probably deprecate access entirely, but disabling pickling will fix
building with Cython 3.3.0

Fixes #2722
---
 lib/cartopy/trace.pyx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/cartopy/trace.pyx b/lib/cartopy/trace.pyx
index 561a16f2b..d963dc31f 100644
--- a/lib/cartopy/trace.pyx
+++ b/lib/cartopy/trace.pyx
@@ -47,6 +47,7 @@ cdef bool close(double a, double b):
 
 
 @cython.final
+@cython.auto_pickle(False)
 cdef class LineAccumulator:
     cdef list[Line] lines