1 files changed, 11 insertions, 0 deletions
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
index 39248e7..b81af87 100644
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -713,6 +713,17 @@ class TestBuggyCases(GetSourceBase):
             self.assertRaises(IOError, inspect.findsource, co)
             self.assertRaises(IOError, inspect.getsource, co)
 
+    def test_findsource_with_out_of_bounds_lineno(self):
+        mod_len = len(inspect.getsource(mod))
+        src = '\n' * 2* mod_len + "def f(): pass"
+        co = compile(src, mod.__file__, "exec")
+        g, l = {}, {}
+        eval(co, g, l)
+        func = l['f']
+        self.assertEqual(func.__code__.co_firstlineno, 1+2*mod_len)
+        with self.assertRaisesRegex(IOError, "lineno is out of bounds"):
+            inspect.findsource(func)
+
     def test_getsource_on_method(self):
         self.assertSourceEqual(mod2.ClassWithMethod.method, 118, 119)