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 <thatiparthysreenivas@gmail.com>
Date: Mon, 17 Mar 2025 16:19:53 +0530
Subject: [PATCH] gh-129843: fix pure Python implementation of
 `warnings.warn_explicit` (GH-129848)
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The pure Python implementation of `warnings.warn_explicit` constructs a `WarningMessage`
with an incorrect source (it incorrectly sets the WarningMessage's line to the given `source`).
(cherry picked from commit 80e00ecc399db8aeaa9f3a1c87a2cfb34517d7be)

Co-authored-by: Srinivas Reddy Thatiparthy (తాటిపర్తి శ్రీనివాస్  రెడ్డి) <thatiparthysreenivas@gmail.com>
---
 Lib/warnings.py                                                 | 2 +-
 .../next/Library/2025-03-17-15-45-36.gh-issue-129843.NPdpXL.rst | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2025-03-17-15-45-36.gh-issue-129843.NPdpXL.rst

diff --git a/Lib/warnings.py b/Lib/warnings.py
index fc8c0128e3a1eb..3bfba9749abe33 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -409,7 +409,7 @@ def warn_explicit(message, category, filename, lineno,
               "Unrecognized action (%r) in warnings.filters:\n %s" %
               (action, item))
     # Print message and context
-    msg = WarningMessage(message, category, filename, lineno, source)
+    msg = WarningMessage(message, category, filename, lineno, source=source)
     _showwarnmsg(msg)
 
 
diff --git a/Misc/NEWS.d/next/Library/2025-03-17-15-45-36.gh-issue-129843.NPdpXL.rst b/Misc/NEWS.d/next/Library/2025-03-17-15-45-36.gh-issue-129843.NPdpXL.rst
new file mode 100644
index 00000000000000..c16d61540edf39
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-03-17-15-45-36.gh-issue-129843.NPdpXL.rst
@@ -0,0 +1 @@
+Fix incorrect argument passing in :func:`warnings.warn_explicit`.