From 472da97098d5f42fdbe5267704af43b07b20ebd1 Mon Sep 17 00:00:00 2001
From: Adarsh Dubey <84132532+inclinedadarsh@users.noreply.github.com>
Date: Mon, 27 Jan 2025 00:12:59 +0530
Subject: [PATCH] fix: deep copy nuts_sampler_kwarg to prevent `.pop` side
 effects (#7652)

---
 pymc/sampling/mcmc.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pymc/sampling/mcmc.py b/pymc/sampling/mcmc.py
index 6fb80284fd..4d7b9ff15a 100644
--- a/pymc/sampling/mcmc.py
+++ b/pymc/sampling/mcmc.py
@@ -338,6 +338,7 @@ def _sample_external_nuts(
                 UserWarning,
             )
         compile_kwargs = {}
+        nuts_sampler_kwargs = nuts_sampler_kwargs.copy()
         for kwarg in ("backend", "gradient_backend"):
             if kwarg in nuts_sampler_kwargs:
                 compile_kwargs[kwarg] = nuts_sampler_kwargs.pop(kwarg)