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Decompression overran buffer (179) while backing up a database. Firebird 5.0.3.1642 #8676

@gsbelarus

Description

@gsbelarus
internal Firebird consistency check (decompression overran buffer (179), file: sqz.cpp line: 494)
gds_$receive failed
unknown ISC error 336330835

version of the Firebird:

gbak:gbak version WI-V5.0.3.1642 Firebird 5.0 9dc399f 
gbak:    Version(s) for database "" 
	Firebird/Windows/AMD/Intel/x64 (access method), version "WI-V5.0.3.1642 Firebird 5.0 9dc399f" 
	on disk structure version 13.1 
gbak:readied database  for backup 
gbak:creating file 
gbak:starting transaction 
gbak:use up to 8 parallel workers 
gbak:database has a page size of 8192 bytes. 

Allegedly, two fields were added to the table while it was being accessed by other connections.
The server has a classic architecture.

@hvlad

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