I think the patch maybe is not quite correct for all the flags. For example,
@@ -7607,44 +7615,44 @@ are available since protocol version 3. <varlistentry> <term>Int8</term> <listitem><para> - Flags; currently unused (must be 0). + Flags (uint8); currently unused. </para></listitem> </varlistentry> AFAIK, even though the flags are "unused", the code still insists that most (or all? Please check the code) of these flag values MUST be 0, so I think that this zero value requirement ought to be indicated in the docs using the "Int8(0)" convention [1]. For example, BEFORE Int8 Flags (uint8); currently unused. AFTER Int8(0) Flags (uint8); currently unused. ------ [1] https://www.postgresql.org/docs/devel/protocol-message-types.html Kind Regards, Peter Smith. Fujitsu Australia.