bitbake: fix wrong usage of format_exc

First parameter of traceback.format_exc is a 'limit' - a number
of stracktraces to format.

Passing exception object to format_exc is incorrect, but it works in
Python 2 as this code from traceback module works:
    while tb is not None and (limit is None or n < limit):
Comparing integer counter n with the exception object in Python 2
always results in True. However, in Python 3 it throws exception:
    TypeError: unorderable types: int() < <Exception type>()

As format_exc is used in except block of handling another
exception this can cause hard to find and debug bugs.

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 907565401..60ee5d7c4 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -330,7 +330,7 @@ class BBCooker:
                                 f.write("%s\n" % json.dumps({"class":event.__module__ + "." + event.__class__.__name__, "vars":json.dumps(pickle.dumps(event)) }))
                             except Exception as e:
                                 import traceback
-                                print(e, traceback.format_exc(e))
+                                print(e, traceback.format_exc())
 
 
                     def send(self, event):