fix: avoid measuring generated code. #1160

2 files changed, 5 insertions, 0 deletions

diff --git a/coverage/disposition.py b/coverage/disposition.py
index dfcc6def..1c39a9c1 100644
--- a/coverage/disposition.py
+++ b/coverage/disposition.py
@@ -30,6 +30,8 @@ def disposition_debug_msg(disp):
     """Make a nice debug message of what the FileDisposition is doing."""
     if disp.trace:
         msg = f"Tracing {disp.original_filename!r}"
+        if disp.original_filename != disp.source_filename:
+            msg += f" as {disp.source_filename!r}"
         if disp.file_tracer:
             msg += ": will be traced by %r" % disp.file_tracer
     else:
diff --git a/coverage/inorout.py b/coverage/inorout.py
index 6bdac06e..3bc7e54e 100644
--- a/coverage/inorout.py
+++ b/coverage/inorout.py
@@ -317,6 +317,9 @@ class InOrOut:
             disp.reason = reason
             return disp
 
+        if original_filename.startswith('<'):
+            return nope(disp, "not a real original file name")
+
         if frame is not None:
             # Compiled Python files have two file names: frame.f_code.co_filename is
             # the file name at the time the .pyc was compiled.  The second name is