I'm very sorry, after finding the issue using the latest stable Linux
version, I accidentally used an outdated version (3.24.0) to produce a
minimal failing case. Here is a reduced example that triggers the bug on
the latest stable [1] and snapshot [2] versions:

CREATE TABLE test (c0 REAL);
CREATE INDEX index_0 ON test(c0 COLLATE NOCASE);
INSERT INTO test(c0) VALUES ('+/');
SELECT * FROM test WHERE (c0 LIKE '+/');

Best,
Manuel


[1] 3.28.0 2019-04-16 19:49:53
884b4b7e502b4e991677b53971277adfaf0a04a284f8e483e2553d0f83156b50
[2] 3.29.0 2019-04-27 20:30:19
50fe48458942fa7a6bcc76316c6321f95b23dc34f2f8e0a483826483b2fb16f6

On Wed, May 1, 2019 at 9:55 PM Warren Young <war...@etr-usa.com> wrote:

> On May 1, 2019, at 1:18 PM, Richard Hipp <d...@sqlite.org> wrote:
> >
> > I am unable to reproduce the observed behavior.
>
> Nor I, on 3.28.0 release with our custom build.
>
> Thank you for providing a simple test case, Manuel: it helps greatly!
>
> > What version of
> > SQLite are you testing with?  Are you compiling it yourself?  If so,
> > what compile-time options do you use?
>
> Also, what is your locale setting?  The fact that COLLATE NOCASE affects
> it makes this smell like a locale/i18n issue, to me.
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