bpo-42246: Partial implementation of PEP 626. (GH-23113)

* Implement new line number table format, as defined in PEP 626.

1 files changed, 14 insertions, 4 deletions

diff --git a/Lib/test/test_sys_settrace.py b/Lib/test/test_sys_settrace.py
index dd4418d..66b1b36 100644
--- a/Lib/test/test_sys_settrace.py
+++ b/Lib/test/test_sys_settrace.py
@@ -220,8 +220,7 @@ ireturn_example.events = [(0, 'call'),
                           (2, 'line'),
                           (3, 'line'),
                           (4, 'line'),
-                          (6, 'line'),
-                          (6, 'return')]
+                          (4, 'return')]
 
 # Tight loop with while(1) example (SF #765624)
 def tightloop_example():
@@ -602,6 +601,17 @@ class TraceTestCase(unittest.TestCase):
         self.compare_events(doit_async.__code__.co_firstlineno,
                             tracer.events, events)
 
+    def test_21_repeated_pass(self):
+        def func():
+            pass
+            pass
+
+        self.run_and_compare(func,
+            [(0, 'call'),
+             (1, 'line'),
+             (2, 'line'),
+             (2, 'return')])
+
     def test_loop_in_try_except(self):
         # https://bugs.python.org/issue41670
 
@@ -766,7 +776,7 @@ class JumpTracer:
         if (self.firstLine is None and frame.f_code == self.code and
                 event == 'line'):
             self.firstLine = frame.f_lineno - 1
-        if (event == self.event and self.firstLine and
+        if (event == self.event and self.firstLine is not None and
                 frame.f_lineno == self.firstLine + self.jumpFrom):
             f = frame
             while f is not None and f.f_code != self.code:
@@ -1540,7 +1550,7 @@ output.append(4)
 """, "<fake module>", "exec")
         class fake_function:
             __code__ = code
-        tracer = JumpTracer(fake_function, 2, 0)
+        tracer = JumpTracer(fake_function, 4, 1)
         sys.settrace(tracer.trace)
         namespace = {"output": []}
         exec(code, namespace)