bpo-31033: Improve the traceback for cancelled asyncio tasks (GH-19951)

When an asyncio.Task is cancelled, the exception traceback now
starts with where the task was first interrupted.  Previously,
the traceback only had "depth one."

1 files changed, 2 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 0f92a9c..847cf26 100644
--- a/setup.py
+++ b/setup.py
@@ -853,7 +853,8 @@ class PyBuildExt(build_ext):
         # _opcode module
         self.add(Extension('_opcode', ['_opcode.c']))
         # asyncio speedups
-        self.add(Extension("_asyncio", ["_asynciomodule.c"]))
+        self.add(Extension("_asyncio", ["_asynciomodule.c"],
+                           extra_compile_args=['-DPy_BUILD_CORE_MODULE']))
         # _abc speedups
         self.add(Extension("_abc", ["_abc.c"]))
         # _queue module