From: Bogdan Romanyuk <65823030+wrongnull@users.noreply.github.com>
Date: Tue, 15 Apr 2025 18:41:52 +0000 (+0000)
Subject: gh-114713: Handle case of an empty string passed to `zoneinfo.ZoneInfo` (#114731)
X-Git-Tag: v3.14.0b1~466
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=884df116d79b05d9342e05e50484d61c684ecb8b;p=thirdparty%2FPython%2Fcpython.git

gh-114713: Handle case of an empty string passed to `zoneinfo.ZoneInfo` (#114731)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Kirill Podoprigora <kirill.bast9@mail.ru>
---

diff --git a/Lib/test/test_zoneinfo/test_zoneinfo.py b/Lib/test/test_zoneinfo/test_zoneinfo.py
index 102a487b4cfa..fff6c0d865b4 100644
--- a/Lib/test/test_zoneinfo/test_zoneinfo.py
+++ b/Lib/test/test_zoneinfo/test_zoneinfo.py
@@ -236,6 +236,7 @@ class ZoneInfoTest(TzPathUserMixin, ZoneInfoTestBase):
             "../zoneinfo/America/Los_Angeles",  # Traverses above TZPATH
             "America/../America/Los_Angeles",  # Not normalized
             "America/./Los_Angeles",
+            "",
         ]
 
         for bad_key in bad_keys:
diff --git a/Lib/zoneinfo/_tzpath.py b/Lib/zoneinfo/_tzpath.py
index 5db17bea045d..990a5c8b6a93 100644
--- a/Lib/zoneinfo/_tzpath.py
+++ b/Lib/zoneinfo/_tzpath.py
@@ -83,6 +83,11 @@ _TEST_PATH = os.path.normpath(os.path.join("_", "_"))[:-1]
 
 
 def _validate_tzfile_path(path, _base=_TEST_PATH):
+    if not path:
+        raise ValueError(
+            "ZoneInfo key must not be an empty string"
+        )
+
     if os.path.isabs(path):
         raise ValueError(
             f"ZoneInfo keys may not be absolute paths, got: {path}"
diff --git a/Misc/NEWS.d/next/Library/2025-03-09-01-09-12.gh-issue-114713.lkq9vZ.rst b/Misc/NEWS.d/next/Library/2025-03-09-01-09-12.gh-issue-114713.lkq9vZ.rst
new file mode 100644
index 000000000000..d30975a8a511
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-03-09-01-09-12.gh-issue-114713.lkq9vZ.rst
@@ -0,0 +1 @@
+Handle case of an empty string passed to :class:`zoneinfo.ZoneInfo`.