commit 0f9bfcc323f76389eab23220d757e1cdfacb0543

Author: Vlad Lesin …

Date:   Wed May 13 14:32:12 2020 +0300

    MDEV-22554: "mariabackup --prepare" exits with code 0 even though innodb

    error is logged

    The fix is to set flag in ib::error::~error() and check it in

    mariabackup.

    ib::error::error() is replaced with ib::warn::warn() in

    AIO::linux_create_io_ctx() because of two reasons:

    1) if we leave it as is, then mariabackup MTR tests will fail with --mem

    option, because Linux AIO can not be used on tmpfs,

    2) when Linux AIO can not be initialized, InnoDB falls back to simulated

    AIO, so such sutiation is not fatal error, it should be treated as warning.