gh-83035: handle decorator with nested parens in inspect.getsource (#99654)

3 files changed, 21 insertions, 9 deletions

diff --git a/Lib/inspect.py b/Lib/inspect.py
index 31ac888..e165937 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -1160,7 +1160,6 @@ class BlockFinder:
         self.started = False
         self.passline = False
         self.indecorator = False
-        self.decoratorhasargs = False
         self.last = 1
         self.body_col0 = None
 
@@ -1175,13 +1174,6 @@ class BlockFinder:
                     self.islambda = True
                 self.started = True
             self.passline = True    # skip to the end of the line
-        elif token == "(":
-            if self.indecorator:
-                self.decoratorhasargs = True
-        elif token == ")":
-            if self.indecorator:
-                self.indecorator = False
-                self.decoratorhasargs = False
         elif type == tokenize.NEWLINE:
             self.passline = False   # stop skipping when a NEWLINE is seen
             self.last = srowcol[0]
@@ -1189,7 +1181,7 @@ class BlockFinder:
                 raise EndOfBlock
             # hitting a NEWLINE when in a decorator without args
             # ends the decorator
-            if self.indecorator and not self.decoratorhasargs:
+            if self.indecorator:
                 self.indecorator = False
         elif self.passline:
             pass
diff --git a/Lib/test/inspect_fodder2.py b/Lib/test/inspect_fodder2.py
index e7d4b53..2dc4981 100644
--- a/Lib/test/inspect_fodder2.py
+++ b/Lib/test/inspect_fodder2.py
@@ -259,3 +259,17 @@ def all_markers_with_args_and_kwargs(a, b, /, c, d, *args, e, f, **kwargs):
 #line 259
 def all_markers_with_defaults(a, b=1, /, c=2, d=3, *, e=4, f=5):
     pass
+
+# line 263
+def deco_factory(**kwargs):
+    def deco(f):
+        @wraps(f)
+        def wrapper(*a, **kwd):
+            kwd.update(kwargs)
+            return f(*a, **kwd)
+        return wrapper
+    return deco
+
+@deco_factory(foo=(1 + 2), bar=lambda: 1)
+def complex_decorated(foo=0, bar=lambda: 0):
+    return foo + bar()
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
index 3f5c299..2b7977b 100644
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -886,6 +886,12 @@ class TestNoEOL(GetSourceBase):
         self.assertSourceEqual(self.fodderModule.X, 1, 2)
 
 
+class TestComplexDecorator(GetSourceBase):
+    fodderModule = mod2
+
+    def test_parens_in_decorator(self):
+        self.assertSourceEqual(self.fodderModule.complex_decorated, 273, 275)
+
 class _BrokenDataDescriptor(object):
     """
     A broken data descriptor. See bug #1785.