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-rw-r--r--coverage/pytracer.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/coverage/pytracer.py b/coverage/pytracer.py
index 6dae014..b41f405 100644
--- a/coverage/pytracer.py
+++ b/coverage/pytracer.py
@@ -166,7 +166,10 @@ class PyTracer(object):
tf = sys.gettrace()
dont_warn = (env.PYPY and env.PYPYVERSION >= (5, 4) and self.in_atexit and tf is None)
if (not dont_warn) and tf != self._trace:
- self.warn("Trace function changed, measurement is likely wrong: %r" % (tf,))
+ self.warn(
+ "Trace function changed, measurement is likely wrong: %r" % (tf,),
+ slug="trace-changed",
+ )
sys.settrace(None)