python
diff --git a/‎Lib/test/test_launcher.py‎
Lines changed: 8 additions & 0 deletions b/‎Lib/test/test_launcher.py‎
Lines changed: 8 additions & 0 deletions
diff --git a/‎Misc/NEWS.d/next/Windows/2024-05-22-19-43-29.gh-issue-119070._enton.rst‎
Lines changed: 3 additions & 0 deletions b/‎Misc/NEWS.d/next/Windows/2024-05-22-19-43-29.gh-issue-119070._enton.rst‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎PC/launcher2.c‎
Lines changed: 1 addition & 1 deletion b/‎PC/launcher2.c‎
Lines changed: 1 addition & 1 deletion
@@ -764,3 +764,11 @@ def test_shebang_command_in_venv(self):
             with self.script(f'#! /usr/bin/env {exe.stem} arg1') as script:
                 data = self.run_py([script], env=env)
             self.assertEqual(data["stdout"].strip(), f"{quote(exe)} arg1 {quote(script)}")
+
+    def test_shebang_executable_extension(self):
+        with self.script('#! /usr/bin/env python3.12') as script:
+            data = self.run_py([script])
+        expect = "# Search PATH for python3.12.exe"
+        actual = [line.strip() for line in data["stderr"].splitlines()
+                  if line.startswith("# Search PATH")]
+        self.assertEqual([expect], actual)
@@ -0,0 +1,3 @@
+Fixes ``py.exe`` handling of shebangs like ``/usr/bin/env python3.12``,
+which were previously interpreted as ``python3.exe`` instead of
+``python3.12.exe``.
@@ -853,7 +853,7 @@ searchPath(SearchInfo *search, const wchar_t *shebang, int shebangLength)
     }
 
     wchar_t filename[MAXLEN];
-    if (wcsncpy_s(filename, MAXLEN, command, lastDot)) {
+    if (wcsncpy_s(filename, MAXLEN, command, commandLength)) {
         return RC_BAD_VIRTUAL_PATH;
     }
Original file line number	Diff line number	Diff line change
@@ -0,0 +1,3 @@
	1	+ Fixes ``py.exe`` handling of shebangs like ``/usr/bin/env python3.12``,
	2	+ which were previously interpreted as ``python3.exe`` instead of
	3	+ ``python3.12.exe``.
Original file line number	Diff line number	Diff line change
@@ -853,7 +853,7 @@ searchPath(SearchInfo search, const wchar_t shebang, int shebangLength)
853	853	}
854	854
855	855	wchar_t filename[MAXLEN];
856		- if (wcsncpy_s(filename, MAXLEN, command, lastDot)) {
	856	+ if (wcsncpy_s(filename, MAXLEN, command, commandLength)) {
857	857	return RC_BAD_VIRTUAL_PATH;
858	858	}
859	859