Debugging to understand why 'trace function changed' appears.

1 files changed, 6 insertions, 0 deletions

diff --git a/coverage/misc.py b/coverage/misc.py
index 3ed854a7..b4d1c833 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -54,6 +54,12 @@ def format_lines(statements, lines):
     return ret
 
 
+def short_stack():
+    """Return a string summarizing the call stack."""
+    stack = inspect.stack()[:0:-1]
+    return "\n".join("%30s : %s @%d" % (t[3],t[1],t[2]) for t in stack)
+
+
 def expensive(fn):
     """A decorator to cache the result of an expensive operation.