Same problem - started July 16th. Randomly getting either "segmentation fault: 11" or "A timestamp was expected but was not found" errors when running codesign. MacOS 10.15.6, Xcode 11.6
Tried restarting, changing time server in System Preference > Date & Time,
finally tried using --timestamp=http://timestamp.apple.com/ts01 parameter for codesign,
no change - sometimes it works, sometimes it fails.
1ini
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