From 5188e275135306652fb0fdb2b3a6a771c147ad8e Mon Sep 17 00:00:00 2001
From: Jiaming Yuan <jm.yuan@outlook.com>
Date: Wed, 16 Aug 2023 22:44:58 +0800
Subject: [PATCH] Fix version parsing with rc release. (#9493)

---
 python-package/xgboost/core.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python-package/xgboost/core.py b/python-package/xgboost/core.py
index fbedfd7fb..27d62cdf2 100644
--- a/python-package/xgboost/core.py
+++ b/python-package/xgboost/core.py
@@ -235,8 +235,11 @@ Error message(s): {os_error_list}
 
     def parse(ver: str) -> Tuple[int, int, int]:
         """Avoid dependency on packaging (PEP 440)."""
-        # 2.0.0-dev or 2.0.0
+        # 2.0.0-dev, 2.0.0, or 2.0.0rc1
         major, minor, patch = ver.split("-")[0].split(".")
+        rc = patch.find("rc")
+        if rc != -1:
+            patch = patch[:rc]
         return int(major), int(minor), int(patch)
 
     libver = _lib_version(lib)