https://bugzilla.mozilla.org/show_bug.cgi?id=1053813
1053813 - Intermittent signtool.py "tar: Error exit delayed from previous errors." whilst copying...
RESOLVED (nobody) in Release Engineering - General. Last updated 2018-05-08.
https://learn.microsoft.com/en-us/dotnet/framework/tools/signtool-exe?redirectedfrom=MSDN
SignTool.exe (Sign Tool) - .NET Framework | Microsoft Learn
Learn about SignTool.exe, the Sign Tool. This command-line tool digitally signs files, verifies signatures in files, and applies timestamps to files.
net frameworkexesigntoolmicrosoft