Index: pym/portage.py
===================================================================
--- pym/portage.py	(revision 5333)
+++ pym/portage.py	(working copy)
@@ -4165,6 +4165,8 @@
 	try:
 		mygroups, eapi = portdb.aux_get(mycpv, ["KEYWORDS", "EAPI"])
 	except KeyError:
+		import traceback
+		traceback.print_exc()
 		# The "depend" phase apparently failed for some reason.  An associated
 		# error message will have already been printed to stderr.
 		return ["corruption"]