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b3e05097e5
There were two places in spell.c that supposed that they could search for a location in a string produced by lowerstr() and then transpose the offset into the original string. But this fails completely if lowerstr() transforms any characters into characters of different byte length, as can happen in Turkish UTF8 for instance. We'd added some comments about this coding in commit 51e78ab4ff328296, but failed to realize that it was not merely confusing but wrong. Coverity complained about this code years ago, but in such an opaque fashion that nobody understood what it was on about. I'm not entirely sure that this issue *is* what it's on about, actually, but perhaps this patch will shut it up -- and in any case the problem is clear. Back-patch to all supported branches.
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.