archive items not in correct section order

Last night for the first time our pg_dump backup threw this error for
the first time. Repeated runs this morning consistently throw it too. I
can see the error in the Postgres source
https://doxygen.postgresql.org/pg__backup__archiver_8c_source.html but I
can't find any specifics about the cause or cure?

Environment: Centos 6.10 kernel 2.6.32-754.2.1.el6.i686

postgresql10.i686                                                                          
10.5-1PGDG.rhel6                                                                       
@pgdg10
postgresql10-contrib.i686                                                                  
10.5-1PGDG.rhel6                                                                       
@pgdg10
postgresql10-devel.i686                                                                    
10.5-1PGDG.rhel6                                                                       
@pgdg10
postgresql10-libs.i686                                                                     
10.5-1PGDG.rhel6                                                                       
@pgdg10
postgresql10-odbc.i686                                                                     
10.03.0000-1PGDG.rhel6                                                                 
@pgdg10
postgresql10-server.i686                                                                   
10.5-1PGDG.rhel6                                                                       
@pgdg10
--
Tim Clarke
IT Director
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