Fix SyntaxWarning deduplication with pseudo-filenames

heliang · heliang · commit 4b056295fa6f · 2025-06-23T11:05:08.000+08:00
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2024-06-23-10-56-32.gh-issue-135801.fix-warning-dedup.rst b/Misc/NEWS.d/next/Core_and_Builtins/2024-06-23-10-56-32.gh-issue-135801.fix-warning-dedup.rst
@@ -0,0 +1 @@
+Fix warning deduplication regression for SyntaxWarnings with pseudo-filenames (e.g., <stdin>, <string>).
diff --git a/Python/_warnings.c b/Python/_warnings.c
@@ -663,7 +663,7 @@ normalize_module(PyObject *filename)
         PyErr_Clear();
         return PyUnicode_FromString("<unknown>");
     }
-    
+
     if (PyUnicode_GetLength(module_name) == 0) {
         Py_DECREF(module_name);
         return PyUnicode_FromString("<unknown>");

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+Fix warning deduplication regression for SyntaxWarnings with pseudo-filenames (e.g., <stdin>, <string>).`
Original file line number	Diff line number	Diff line change
`@@ -663,7 +663,7 @@ normalize_module(PyObject *filename)`
`663`	`663`	`PyErr_Clear();`
`664`	`664`	`return PyUnicode_FromString("<unknown>");`
`665`	`665`	`}`
`666`		`-`
	`666`	`+`
`667`	`667`	`if (PyUnicode_GetLength(module_name) == 0) {`
`668`	`668`	`Py_DECREF(module_name);`
`669`	`669`	`return PyUnicode_FromString("<unknown>");`