pgsql: Fail pgwin32_message_to_UTF16() for SQL_ASCII messages.

From: Noah Misch <noah(at)leadboat(dot)com>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Fail pgwin32_message_to_UTF16() for SQL_ASCII messages.
Date: 2019-05-12 17:47:09
Message-ID: E1hPsZ2-0007qw-W3@gemulon.postgresql.org
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Fail pgwin32_message_to_UTF16() for SQL_ASCII messages.

The function had been interpreting SQL_ASCII messages as UTF8, throwing
an error when they were invalid UTF8. The new behavior is consistent
with pg_do_encoding_conversion(). This affects LOG_DESTINATION_STDERR
and LOG_DESTINATION_EVENTLOG, which will send untranslated bytes to
write() and ReportEventA(). On buildfarm member bowerbird, enabling
log_connections caused an error whenever the role name was not valid
UTF8. Back-patch to 9.4 (all supported versions).

Discussion: https://postgr.es/m/20190512015615.GD1124997@rfd.leadboat.com

Branch
------
REL_11_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/4ec14e5aa1f79d01a2558b694ccbe7756c4d186e

Modified Files
--------------
src/backend/utils/mb/mbutils.c | 9 +++++++--
src/bin/pg_dump/t/010_dump_connstr.pl | 6 ++----
src/bin/scripts/t/200_connstr.pl | 6 ++----
3 files changed, 11 insertions(+), 10 deletions(-)

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