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[Sergey Vojtovich <svoj@xxxxxxxxxxx>]

Roberto,

This error comes from Field_longstr::compress(), where we perform truncation
if *to_length <= length.

Regards,
Sergey

On Sat, Mar 17, 2018 at 09:31:29AM -0300, Roberto Spadim wrote:
> at git commit:
> https://github.com/MariaDB/server/commit/fdc47792354c820aa4a8542d7c00d434424a63fb#diff-06426300d2671c77dd6763db8df79306R3257
> 
> 
> instead of:
> +  return n < 256 ? 1 : n < 65536 ? 2 : n < 16777216 ? 3 : 4;
> 
> use:
> +  return n < 256*-1* ? 1 : n < 65536*-1* ? 2 : n < 16777216*-1* ? 3 : 4;
> 
> 
> since length is reduced by one:
> https://github.com/MariaDB/server/commit/fdc47792354c820aa4a8542d7c00d434424a63fb#diff-06426300d2671c77dd6763db8df79306R3241