Fix a bug in the construction of the time-to-segment map in compatibility deserialization.
Fix a bug in the construction of the time-to-segment map in compatibility deserialization.

pleroy/Principia,mockingbirdnest/Principia,pleroy/Principia,mockingbirdnest/Principia,mockingbirdnest/Principia,mockingbirdnest/Principia,pleroy/Principia,pleroy/Principia