From acb434c14c9b0166e7e375b2f08d567453cf2e50 Mon Sep 17 00:00:00 2001
From: Martin Larralde <martin.larralde@ens-paris-saclay.fr>
Date: Thu, 3 Dec 2020 15:30:23 -0700
Subject: [PATCH] Handle the situation where get_rust_version() returns None

---
 setup.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index 2328751..09fd433 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,8 @@ class build_rust(_build_rust):
     def run(self):
 
         try:
-            nightly = "nightly" in get_rust_version().prerelease
+            rustc = get_rust_version()
+            nightly = rustc.prerelease is not None and "nightly" in rustc.prerelease
         except DistutilsPlatformError:
             if sys.platform in ("linux", "darwin"):
                 self.setup_temp_rustc_unix(toolchain="nightly", profile="minimal")