Previously, make_boolean_term did not quote empty boolean terms or boolean terms that started with '('. These cases are incompatible with Xapian: empty terms cannot be omitted, and boolean terms that start with '(' trigger an alternate term quoting syntax. Fix this by quoting empty terms and terms that contain '('. --- The previous version missed the empty term case. util/string-util.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/util/string-util.c b/util/string-util.c index 9e2f728..3e7066c 100644 --- a/util/string-util.c +++ b/util/string-util.c @@ -75,10 +75,12 @@ make_boolean_term (void *ctx, const char *prefix, const char *term, int need_quoting = 0; /* Do we need quoting? To be paranoid, we quote anything - * containing a quote, even though it only matters at the + * containing a quote or '(', even though these only matter at the * beginning, and anything containing non-ASCII text. */ + if (! term[0]) + need_quoting = 1; for (in = term; *in && !need_quoting; in++) - if (is_unquoted_terminator (*in) || *in == '"' + if (is_unquoted_terminator (*in) || *in == '"' || *in == '(' || (unsigned char)*in > 127) need_quoting = 1; -- 1.8.4.rc3