There are no folds to multiple chars in early Unicode versions

Several places require special handling because of this, notably for the
lowercase Sharp S, but not in Unicodes before 3.0.1

1 files changed, 6 insertions, 0 deletions

diff --git a/pp.c b/pp.c
index f750fce304..57b05b3d14 100644
--- a/pp.c
+++ b/pp.c
@@ -4401,8 +4401,14 @@ PP(pp_fc)
     const U8 *send;
     U8 *d;
     U8 tmpbuf[UTF8_MAXBYTES_CASE + 1];
+#if    UNICODE_MAJOR_VERSION > 3 /* no multifolds in early Unicode */   \
+   || (UNICODE_MAJOR_VERSION == 3 && (   UNICODE_DOT_VERSION > 0)       \
+                                      || UNICODE_DOT_DOT_VERSION > 0)
     const bool full_folding = TRUE; /* This variable is here so we can easily
                                        move to more generality later */
+#else
+    const bool full_folding = FALSE;
+#endif
     const U8 flags = ( full_folding      ? FOLD_FLAGS_FULL   : 0 )
 #ifdef USE_LOCALE_CTYPE
                    | ( IN_LC_RUNTIME(LC_CTYPE) ? FOLD_FLAGS_LOCALE : 0 )