fixup! gh-105013: Fix inspect.getsource with parenthesized multiline lambdas

pablogsal · pablogsal · commit 649397d95c13 · 2023-05-27T17:10:41.000+01:00
diff --git a/Lib/inspect.py b/Lib/inspect.py
@@ -1245,6 +1245,11 @@ def getblock(lines):
     except SyntaxError as e:
         if "unmatched ')" not in e.msg:
             raise e from None
+        _, *_token_info = _token
+        try:
+            blockfinder.tokeneater(tokenize.NEWLINE, *_token_info)
+        except (EndOfBlock, IndentationError):
+            pass
     return lines[:blockfinder.last]
 
 def getsourcelines(object):
diff --git a/Lib/test/inspect_fodder2.py b/Lib/test/inspect_fodder2.py
@@ -280,4 +280,9 @@ def complex_decorated(foo=0, bar=lambda: 0):
 
 # line 281
 post_line_parenthesized_lambda = (lambda: ()
-)
+)
+
+# line 285
+nested_lambda = (
+    lambda right: [].map(
+        lambda length: ()))
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
@@ -786,6 +786,10 @@ def test_post_line_parenthesized_lambda(self):
         # function.
         self.assertSourceEqual(mod2.post_line_parenthesized_lambda, 282, 283)
 
+    def test_nested_lambda(self):
+        # Test inspect.getsource with a nested lambda function.
+        self.assertSourceEqual(mod2.nested_lambda, 287, 288)
+
     def test_onelinefunc(self):
         # Test inspect.getsource with a regular one-line function.
         self.assertSourceEqual(mod2.onelinefunc, 37, 37)
