Re: back-port one-line gcc-10+ warning fix to REL_10_STABLE

On 2021-Jun-07, Anton Voloshin wrote:

> Hello, hackers,
> 
> Currently, REL_10_STABLE can't be compiled with gcc-10 or 11, -Werror and
> "./configure" without arguments. E.g. gcc-11 gives an error:

Hi, thanks for the report.  I noticed that the commit that introduced
this (41306a511c01) was introduced in 9.5, so I was surprised that you
report it doesn't complain in 9.6.  Turns out that Peter E had fixed the
issue, but only in 9.5 and 9.6; I don't really understand why no fix was
applied to 10.  I forward-ported that commit to 10, which should also
fix the problem.  Branches 11 and up already have Tom Lane's fix.

-- 
Álvaro Herrera       Valdivia, Chile
"[PostgreSQL] is a great group; in my opinion it is THE best open source
development communities in existence anywhere."                (Lamar Owen)