bpo-46873: Fix inspect.getsource - Count parentheses open/close in decorators

Lib/inspect.py

@@ -1174,9 +1174,13 @@ def __init__(self):
         self.started = False
         self.passline = False
         self.indecorator = False
-        self.decoratorhasargs = False
         self.last = 1
         self.body_col0 = None
+        self._decoratorhasargs_count = 0
+
+    @property
+    def decoratorhasargs(self):
+        return bool(self._decoratorhasargs_count)
 
     def tokeneater(self, type, token, srowcol, erowcol, line):
         if not self.started and not self.indecorator:
@@ -1191,11 +1195,12 @@ def tokeneater(self, type, token, srowcol, erowcol, line):
             self.passline = True    # skip to the end of the line
         elif token == "(":
             if self.indecorator:
-                self.decoratorhasargs = True
+                self._decoratorhasargs_count += 1
         elif token == ")":
             if self.indecorator:
-                self.indecorator = False
-                self.decoratorhasargs = False
+                self._decoratorhasargs_count -= 1
+                if not self.decoratorhasargs:
+                    self.indecorator = False
         elif type == tokenize.NEWLINE:
             self.passline = False   # stop skipping when a NEWLINE is seen
             self.last = srowcol[0]

Lib/test/inspect_fodder3.py

@@ -0,0 +1,9 @@
+# line 1
+def wrap_many(*foo):
+    def wrapper(func):
+        return func
+    return wrapper
+
+@wrap_many(lambda: bool(True), lambda: True)
+def func8():
+    return 9

Lib/test/test_inspect.py

@@ -31,6 +31,7 @@
 from test.support.script_helper import assert_python_ok, assert_python_failure
 from test import inspect_fodder as mod
 from test import inspect_fodder2 as mod2
+from test import inspect_fodder3 as mod3
 from test import support
 from test import inspect_stock_annotations
 from test import inspect_stringized_annotations
@@ -673,6 +674,12 @@ def test_getsource_unwrap(self):
     def test_decorator_with_lambda(self):
         self.assertSourceEqual(mod2.func114, 113, 115)
 
+class TestDecoratorsMulti(GetSourceBase):
+    fodderModule = mod3
+
+    def test_decorator_with_multiple_lambdas_with_calls(self):
+        self.assertSourceEqual(mod3.func8, 7, 9)
+
 class TestOneliners(GetSourceBase):
     fodderModule = mod2
     def test_oneline_lambda(self):