From 946788f6eeeef12289d06ebe99d3f26c3763daf2 Mon Sep 17 00:00:00 2001
From: Tomas Roun <tomas.roun8@gmail.com>
Date: Sat, 12 Apr 2025 13:44:17 +0200
Subject: [PATCH 1/3] Test syntax warnings in a finally block

---
 Lib/test/test_compile.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Lib/test/test_compile.py b/Lib/test/test_compile.py
index 0377b3f954f44b..0f323792f667d4 100644
--- a/Lib/test/test_compile.py
+++ b/Lib/test/test_compile.py
@@ -1664,6 +1664,24 @@ def test_compile_warnings(self):
 
         self.assertEqual(len(caught), 2)
 
+    def test_compile_warning_in_finally(self):
+        # Ensure that warnings inside finally blocks are
+        # only emitted once despite the block being
+        # compiled twice (for normal execution and for
+        # exception handling).
+        source = textwrap.dedent("""
+            try:
+                pass
+            finally:
+                1 is 1
+        """)
+
+        with warnings.catch_warnings(record=True) as caught:
+            warnings.simplefilter("default")
+            compile(source, '<stdin>', 'exec')
+
+        self.assertEqual(len(caught), 1)
+
 class TestBooleanExpression(unittest.TestCase):
     class Value:
         def __init__(self):

From 6b0c13cb877b4e06eb1873443e05c140450cf052 Mon Sep 17 00:00:00 2001
From: Tomas Roun <tomas.roun8@gmail.com>
Date: Sat, 12 Apr 2025 23:25:48 +0200
Subject: [PATCH 2/3] Improve test

---
 Lib/test/test_compile.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/test/test_compile.py b/Lib/test/test_compile.py
index 0f323792f667d4..57e5f29b015637 100644
--- a/Lib/test/test_compile.py
+++ b/Lib/test/test_compile.py
@@ -1681,6 +1681,8 @@ def test_compile_warning_in_finally(self):
             compile(source, '<stdin>', 'exec')
 
         self.assertEqual(len(caught), 1)
+        self.assertEqual(caught[0].category, SyntaxWarning)
+        self.assertIn("\"is\" with 'int' literal", str(caught[0].message))
 
 class TestBooleanExpression(unittest.TestCase):
     class Value:

From b3db7ed2b87eb076c882b2f98b0b9911c6f79c3e Mon Sep 17 00:00:00 2001
From: Tomas Roun <tomas.roun8@gmail.com>
Date: Sun, 13 Apr 2025 10:35:47 +0200
Subject: [PATCH 3/3] Add news entry

---
 .../2025-04-13-10-34-27.gh-issue-131927.otp80n.rst             | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2025-04-13-10-34-27.gh-issue-131927.otp80n.rst

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-04-13-10-34-27.gh-issue-131927.otp80n.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-04-13-10-34-27.gh-issue-131927.otp80n.rst
new file mode 100644
index 00000000000000..9aa940a10daa69
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-04-13-10-34-27.gh-issue-131927.otp80n.rst
@@ -0,0 +1,3 @@
+Compiler warnings originating from the same module and line number are now
+only emitted once, matching the behaviour of warnings emitted from user
+code. This can also be configured with :mod:`warnings` filters.