tnef package version 1.4.15 is affected by a broken assertion which prevent some calendar notification to be properly parsed.
Version 1.4.17 fix this issue, but is not yet in portage.
I've tested it already by using the local portage override, by simply changing the filename and it compiles well. It also seems to work ok, but haven't tested it extensively.
Steps to Reproduce:
1. emerge '=net-mail/tnef-1.4.17'
The bug has been referenced in the following commit(s):
Author: Jeroen Roovers <firstname.lastname@example.org>
AuthorDate: 2019-09-26 19:25:05 +0000
Commit: Jeroen Roovers <email@example.com>
CommitDate: 2019-09-26 19:25:26 +0000
net-mail/tnef: Version 1.4.17
Package-Manager: Portage-2.3.76, Repoman-2.3.17
Signed-off-by: Jeroen Roovers <firstname.lastname@example.org>
net-mail/tnef/Manifest | 1 +
net-mail/tnef/tnef-1.4.17.ebuild | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)